|First appearance||Halo: The Fall of Reach (2001)|
|First game||Halo: Combat Evolved (2001)|
|Voiced by||Jen Taylor (video games and live-action series)
Shelley Calene-Black (Halo Legends)
Cortana is a fictional artificially intelligent character in the Halo video game series. Voiced by Jen Taylor, she appears in Halo: Combat Evolved and its sequels, Halo 2, Halo 3, Halo 4, Halo 5: Guardians and Halo Infinite. She also briefly appears in the prequel Halo: Reach, as well as in several of the franchise's novels, comics, and merchandise. During gameplay, Cortana provides backstory and tactical information to the player, who often assumes the role of Master Chief Petty Officer John-117. In the story, she is instrumental in preventing the activation of the Halo installations, which would have destroyed all sentient life in the galaxy.
Cortana's original design was based on the Egyptian queen Nefertiti; the character's holographic representation always takes the form of a woman. Game developer Bungie first introduced Cortana—and Halo—through the Cortana Letters, emails sent during Combat Evolved's production in 1999.
The relationship between Cortana and Master Chief has been highlighted by reviewers as one of the most important parts of the Halo games' story. Cortana has been recognized for her believability and character depth, as well as her sex appeal. The character was the inspiration for Microsoft's intelligent personal assistant of the same name.
Cortana is an artificial intelligence found in the Halo franchise. In the video games, Cortana often serves as an advisor and assistant to the player character, hacking alien computer systems and decoding transmissions. She speaks most of the first game's dialogue, and serves as a talkative foil for the quieter Master Chief, as well as a way of relaying information and objectives to the player.
According to her backstory, Cortana was derived from the cloned brain of Dr. Catherine Elizabeth Halsey, the creator of the SPARTAN-II supersoldier project; Halsey's synapses became the basis for Cortana's processors.: 218 Cortana and other AIs are subject to a seven-year lifespan, after which they begin to dissemble and think themselves to death in a process known as rampancy.
As an artificial construct, Cortana has no physical form or being. Cortana speaks with a smooth female voice, and projects a holographic image of herself as a woman. Cortana is said to resemble Halsey, with a similar attitude "unchecked by military and social protocol". In Halo: The Fall of Reach, Cortana is described as slender, with close-cropped hair and a skin hue that varies from navy blue to lavender, depending on her mood.: 216 Numbers and symbols flash across her form when she is thinking. Halsey sees Cortana as a teenage version of herself: smarter than her parents, always "talking, learning, and eager to share her knowledge".: 218 Cortana is described as having a sardonic sense of humor and often cracks jokes or wryly comments, even during combat.: 217
In video games
Halo: Combat Evolved
Cortana's first game appearance is in 2001's Halo: Combat Evolved. Humanity is locked in a losing war with the alien Covenant. Cortana plots a course for the human ship Pillar of Autumn to escape the Covenant. This heading leads to the discovery of a massive ringworld, Halo, built by a mysterious race known as the Forerunners. Cortana defends the ship from the Covenant until she is given to the supersoldier Master Chief to prevent her from falling into enemy hands. Cortana helps direct human survivors scattered across the ring and assists the Master Chief in his missions. Inserted into Halo's Control Room, Cortana realizes that the ring serves as a prison for the parasitic Flood; activating Halo would mean destroying all sentient life in the galaxy to prevent the Flood's spread. Cortana assists Master Chief in destroying the ring and escaping.
In Halo 2, Cortana assists in the defense of Earth in the wake of a Covenant attack. Cortana, Chief and human forces travel to another Halo ring, Delta Halo, where Master Chief and Cortana encounter the Flood intelligence Gravemind. The Gravemind sends Chief and Cortana to the Covenant city-ship of High Charity to stop the Covenant from activating Halo; Cortana ultimately stays behind on High Charity to destroy the city and Halo should Master Chief fail in his mission. High Charity and Cortana are captured by the Flood.
In Halo 3, Cortana appears to the player in broken transmission, warning Chief about the Flood. On the Forerunner installation known as the Ark, the Master Chief travels through the ruins of High Charity to rescue Cortana. Chief and Cortana are successful at stopping the Flood after activating an incomplete ring, but become stranded in deep space aboard half of the Forward Unto Dawn. Cortana activates a distress beacon, while Master Chief goes into cryonic sleep to await rescue.
At the beginning of Halo 4 Cortana wakes the Chief as Forward Unto Dawn drifts towards a Forerunner installation called Requiem. Cortana begins displaying aberrant glitches and behavior, and reveals that she is suffering from rampancy as she approaches the end of her seven-year lifespan. She assists in the battle against the Prometheans and their leader the Didact, a rogue Forerunner who seeks to destroy humans after a pair unknowingly awoke him. At the end, Cortana sacrifices herself to save the Chief and stop the Didact's plan.
However, Cortana's survival is revealed in Halo 5, when she calls Master Chief to the Forerunner world Genesis. Cortana explains she survived the destruction of the Didact's ship and cured her own rampancy by entering the Domain, an ancient repository of knowledge. Granted an infinite life span by the Domain, Cortana believes that she and other AI (the "Created") should enforce peace through the galaxy. Cortana begins using ancient Forerunner constructs known as Guardians to enforce the Created's will throughout the galaxy, as the Infinity escapes.
In Halo Infinite, Master Chief travels to the Zeta Halo and recovers the Weapon, a copy of Cortana designed to trap her for deletion. Traveling across a damaged Halo's surface and fighting the Banished, the pair recover data fragments left behind by Cortana that fill in what occurred six months earlier; Cortana threatened the Banished leader Atriox, and destroyed his homeworld when he did not submit.
As the Infinity approaches the ring, Cortana was waiting for Chief to stop her, but instead a vengeful Atriox, using the Weapon he took from the Infinity, to enslave Cortana. He informs that the Banished had already defeated the UNSC and Chief, and orders Cortana to surrender the ring to the Banished. Finally realizing her mistakes because of Chief’s death, Cortana destroys herself by damaging the ring, stopping the Banished from possessing it, as well as the Weapon's deletion, and deactivating all Guardians. In a final message, Cortana apologizes to Chief for her actions and encourages him to work with the Weapon.
Cortana's first appearance in the Halo franchise is in the novel Halo: The Fall of Reach, a prequel to the first Halo game. Dr. Halsey allows Cortana to choose which SPARTAN-II soldier to accompany on an upcoming mission; Cortana picks the Master Chief, whom she believes is her best match. Cortana helps the Master Chief to survive the near-lethal exercises designed to test the Chief's armor. Afterward, she plants incriminating evidence in the files of Colonel Ackerson, the operative who nearly killed both of them, as revenge. Cortana makes a small appearance in 2010's Halo: Reach, set shortly before the events of Combat Evolved. A fragment of Cortana carrying information gleaned from a Forerunner artifact combines with Cortana's main self on Pillar of Autumn before the ship escapes the planet, leading to the events of Combat Evolved.
Cortana also appears in the novelization of Combat Evolved, Halo: The Flood, and the following novels Halo: First Strike and Halo: Ghosts of Onyx, as well as the animated series Halo Legends and live-action television series Halo 4: Forward Unto Dawn. She is also a main character in "Human Weakness", a short story written by Karen Traviss for the Halo Evolutions anthology that details Cortana's time in the clutches of the Gravemind.
She also appears in the Halo television series, created by Dr. Halsey as a means of keeping Master Chief and other Spartans in line. By cloning herself and then copying her clone's brain patterns (which also kills her), Halsey is able to bring Cortana to life and then implant her directly into Master Chief's neural pathways.
Cortana was developed to provide Combat Evolved with a way of guiding players while keeping missions open-ended, and avoiding players from feeling they were being herded through the game. Said story writer Joseph Staten, "we needed a character who could consistently guide the player through the game, and an onboard AI was something that could always credibly accompany [them]." Cortana's role grew from pure gameplay considerations to serving as a way of characterizing and humanizing the Master Chief, and in subsequent games the Chief-Cortana relationship became a focus of characterization.
The character was designed and modeled by Bungie artist Chris Hughes, with the model's face based on a sculpture of Egyptian Queen Nefertiti. Cortana's name is a variant of Curtana, the sword used by the legendary Ogier the Dane, just as the titular AI character of Bungie's previous game Marathon 2: Durandal is named after the legendary sword Durendal. Curtana's inscription reveals that the sword has the same "temper as Joyeuse and Durendal". After assuming development duties from Bungie, 343 Industries decided to explain Cortana's established appearance as a reflection of her personality. "So one of the reasons she [appears as she does] is to attract and demand attention," Franchise development coordinator Frank O'Connor explained. "And she does it to put people off so that they're on their guard when talking to her and she has the upper hand in those conversations."
Cortana and the Master Chief's relationship was a core part of Halo 4, part of a desire to feature a more human story. Creative director Josh Holmes noted that Cortana was in ways more human than Master Chief, and the idea that Chief would grapple with his humanity at the same time he was losing Cortana spoke to him. Holmes' mother was diagnosed with dementia during development, and his real-life struggles informed the characterization of Cortana's descent into rampancy and the Chief-Cortana relationship. Holmes and the team drew inspiration from the relationship in the game Ico, where the main characters share a strong bond, as well as the many layers to the two characters' relationship; "In some ways they’re friends, in some ways she’s almost like a mother, in others they’re skirting that line of lovers, and so all these different elements come into the relationship, making it complex and interesting to explore." Cortana's new appearance for Halo 4 was one of the game's most dramatic changes. Early in production, concept artists created a variety of "crazy ideas" and explorations for how Cortana might look. Promising 2D designs were turned into simple 3D maquettes to prototype them in the game engine. Character artist Matt Aldridge recalled that Cortana was one of the hardest characters to envision in the game because of how beloved the character is by players; one of Aldridge's goals was to create a character where scrolling lines of code would flow uninterrupted from her feet to her head. Art director Kenneth Scott was responsible for Cortana's final design. The character's motion capture was performed by Mackenzie Mason.
For Halo 5, Cortana's appearance changes significantly. Describing her previous appearance as soft and "deceptively vulnerable", 343 Industries took the story opportunity provided to change her look to reflect her new role as self-declared ruler of the galaxy. "In the first draft of the ending she was going to wear a flowing gown, have long hair, etc. She'd be very regal, very “powerful high queen." Very obviously different than she was," writer Brian Reed recalled. Her final design incorporated elements of the Spartans and Forerunners on top of her previous look, including a Forerunner glyph. "Having her wear [the Mantle] was a nice way of having her own it too, from a symbolic standpoint," Reed said. The character was modeled and animated using motion capture and talent at 343 Industries and Axis Animation. 343 Industries intended the character's normal role in gameplay to be filled by Blue Team.
Cortana's design, particularly her human-like appearance, was met with controversy after the TV series' trailer was released. Kiki Wolfkill explained that the decision was influenced by technology, as the team prefers to use the most up-to-date tools to make thoughtful design decisions, as they have done throughout the series' decades-long history. She further said "A lot of the design changes as we progress[ed] through the game generations was because we had access to better graphics, technology, more pixels, and more effects. And so it's always been about adapting Cortana to the environment."
Voice actress Jen Taylor voices Cortana in the majority of the character's appearances. Despite her role in voicing other video game characters, including Princess Peach, she is not a gamer. Taylor was a college acquaintance of Joseph Staten, and he recommended her as a possible voice for Cortana to audio director Martin O'Donnell. When choosing a voice actor for the character, Bungie originally wanted Cortana to have a British accent. O'Donnell recalled that Taylor's British accent was good, but felt it was too similar to her work for No One Lives Forever. The accent was dropped, but British colloquialisms remained in the character's dialogue. Taylor recalled that a key directive from Bungie about the character was that she not come off as nagging, despite her role as the player's guide and aid. "They wanted her to be like the girl next door, your best friend that you want to hang out with," she said. She felt that portraying Cortana was occasionally challenging because the character lacks a physical form.
For years after the first game was released Taylor remained distanced from the character. She attended only one fan convention in six years after the release of Halo: Combat Evolved, and never saw many of the finished cutscenes with the character until a Halo 3 launch party. Starting with Halo 3, Taylor felt the role involved more drama and less jargon, and over time, her relationship with the character changed. "At first I was just excited to have a job and then I became more and more familiar, comfortable with and interested in her as she was developed," she recalled. "And I've sort of fallen for Cortana as far as characters go. She's remarkable." For Halo 4, Taylor performed her lines in the same room as Steve Downes, the voice of Master Chief, for the first time in the series. She credited the change for making the dialogue feel more authentic and real. She reprises her role as Cortana for the Halo television series.
Bungie introduced the Halo series publicly in 1999 by sending the Cortana Letters, a series of cryptic email messages, to the maintainer of marathon.bungie.org, a fan site for one of Bungie's other game series. The strategic use of cryptic messages in a publicity campaign was repeated in I Love Bees, a promotion for Halo 2. Although Bungie does not consider most of the letters to be canon, Cortana speaks many of the same lines in Halo 3. According to C. J. Cowan, Bungie's director of cinematics, the studio used the character here to give story clues without actually revealing the story.
Cortana is featured in a variety of Halo merchandise. The character's first action figure was a seven-inch (178 mm) miniature released as part of the Halo: Combat Evolved series of action figures. McLees noted that the first action figure was supposed to convey an older appearance than was depicted in the games. This was accomplished by making the figure more buxom; despite McLees' request to revert the change, the sculptor was unwilling and time constraints left the design intact. The character is also featured in the first series of Halo 3 action figures, distributed by McFarlane Toys, Funko vinyl figurines, and in a limited-edition silver-plated statue by Weta Workshop. IGN noted that Cortana toys are lacking among Halo's merchandising.
Windows digital assistant
Microsoft developed its virtual assistant for the Windows Phone operating system under the codename "Cortana" in reference to the Halo character. Though other final gender-neutral names for the final product were considered, positive developer and fan response to the leaked codename led to it becoming permanent. Deborah Harrison, one of Cortana's 'personality designers', met with 343 Industries and added more confidence to the personality. "As a result of the meetings we ended up coming back and baking this into the DNA of the digital assistant speech pattern, her approach to jokes and her approach to chit chat, and we decided to dial up her sense of self possession," Harrison recalled. Jen Taylor provides the voice for the virtual assistant. Microsoft released a beta for Cortana in April 2014 with the developer release of Windows Phone 8.1. Microsoft also released Cortana virtual assistant on the Xbox One, Windows 10, iOS, and Android platforms.
Cortana is one of Halo's most beloved characters, and has appeared in numerous lists of video game's best sidekicks. Tom's Hardware named the character one of the 50 greatest female characters for the character's determination and fearlessness, which meshed perfectly with the game's protagonist, while Glixel staff described Cortana as one of the most iconic video game character of the 21st century. Den of Geek's Megan Crouse called Cortana one of the Halo series' most important characters, and her relationship with her mother figure Halsey a relationship that was under-appreciated in much of the franchise. Professor Monica Evans on a book Halo and Philosophy: Intellect Evolved called Cortana the most human character in the original game and one of the most developed.
Cortana has also been recognized for her sex appeal; the character has been included on lists of attractive video game characters from publications such as Team Xbox, GameDaily, Games.net, Thanh Niên, and Complex. Feminist critic Anita Sarkeesian argues that Cortana had gotten "more and more sexualized in every new installment"; 1UP.com noted that as Cortana's sanity waned in the video games, her clothing appeared to decrease as well. Time's Matt Peckham described Cortana's character as a controversial figure, with a tension between being well-rounded character and being trapped as "[an] adolescent male's fantasy notion of a Campbellian hero figure," and that this tension had increased commensurately with the game series' graphical fidelity. Media critic Maddy Myers suggested that O'Connor's explanation for Cortana's look implies that the Halo universe's futuristic setting still grapples with systemic sexism.
Mike Rougeau of Complex noted that Halo 3 balanced a large conflict with a more personal one—that while the galaxy was imperiled by aliens, "more important to fans was the rescue of Cortana." While Cortana's role was greatly expanded in the game, Stuff.co.nz noted that the character "has inexplicably had a sexy makeover".
Despite mixed opinions of Halo 4's campaign as a whole, Cortana and her story was often considered a strong point of the game. IGN called Halo 4 "really Cortana's story", as saving the galaxy is of lesser importance to the Master Chief than saving Cortana, and Cortana's humanity is ultimately the game's focus. The Daily Telegraph's Tom Hoggins agreed, calling Cortana "the flickering blue heart of the game's plot", and Hoggins and reviewers for The Globe and Mail and Eurogamer singled out the character's writing and performance as high points of the game's campaign. Justin Clouse wrote that the interactions between Chief and Cortana as the latter loses her hold on sanity were "perhaps the best it's ever been". Complex's review praised the use of motion capture for Cortana, as they were given "new life" and new depth from the technology and performance.
David Their wrote that the choice for Cortana to return in Halo 5 and turn her into an antagonist provided the game "with a well earned sense of drive" and that her appearance in Halo 5 gave players another side of the character to see. "There's something unknowable about Cortana in her new role as AI God, but we've spent enough time with her throughout the series that we stick with her through the reinvention." Similarly, Patrick Dane of Bleeding Cool defended the game's divisive campaign and Cortana's turn to antagonist as an "inspired choice", driving a wedge between the most important character relationship in the games. Conversely, Matt Peckham felt that the plot twist of Cortana's actions "feels strangely underwhelming", while Ars Technica and Kotaku considered Cortana's return, and her plans to use alien technology to remake the galaxy, unbelievable and unearned. Responding to criticism that 343 had turned Cortana "evil", franchise director Frank O'Connor said, "my question back to them is, 'What makes you say they’re evil?' Certainly a lot of our younger players are going to struggle with that subtlety, that nuance, because they’re expecting Darth Vader." Stephen Wilds of Polygon said that that "there aren’t notable antagonists, but that they tend to disappear after a couple games", and wondered if Cortana could have been a "full-fledged villain at the end of Halo 5" and would be praised by fans.
- Skrebels, Joe (November 11, 2020). "Halo TV Series Recasts Cortana With Original Voice Actress". IGN. Retrieved July 15, 2023.
- Ashley, Catherine (September 8, 2014). "ATTACK ON OTAKUTHON!: INTERVIEW WITH SHELLEY CALENE-BLACK". Girls On Games. Retrieved July 15, 2023.
- Bungie, ed. (2001). Halo: Combat Evolved Instruction Manual (PDF). Microsoft Game Studios. pp. 6–10. Archived from the original (PDF) on December 15, 2011. Retrieved February 4, 2019.
- Van Lente, Fred (2011). "UNSC Briefing". In Cuddy, Luke (ed.). Halo and Philosophy: Intellect Evolved. Open Court. p. ix. ISBN 978-0812697186.
- Martin, Tim (October 13, 2012). "Brave new worlds: 'Halo' heralded a revolution in gaming and a 2 billion franchise. Can 'Halo 4' do the same?". The Daily Telegraph. p. 10.
- Nylund, Eric (2001). Halo: The Fall of Reach. New York: Ballantine Books. ISBN 978-0-345-45132-3.
- Mitchell, Richard (April 2, 2013). "Halo 4 as a love story: The personal origins of Cortana's breakdown". Engadget. Oath, Inc. Archived from the original on December 2, 2017. Retrieved March 28, 2018.
- Martens, Todd (November 1, 2012). "'Halo 4' review: Master Chief is human after all". Los Angeles Times. Archived from the original on July 17, 2013. Retrieved March 28, 2018.
- Dietz, William (2003). Halo: The Flood. New York: Ballantine Books. p. 9. ISBN 978-0-345-45921-3.
- Staff (September 14, 2004). "Halo 2: Bios Blowout". Team Xbox. Archived from the original on December 22, 2007. Retrieved April 27, 2014.
- Staff (October 25, 2015). "A Halo 5 Primer: The Story So Far". Xbox Wire. Microsoft. Retrieved January 31, 2019.
- Cordon, Jez (October 18, 2015). "Prepare yourself for Halo 5 with these quick story recaps". Windows Central. Retrieved January 31, 2019.
- Lowry, Brendan (October 19, 2019). "Halo timeline: Cortana's return and the rise of the Created". Windows Central.
- "All Halo Games in Order According to Lore". February 5, 2021.
- Pritchard, Tom (December 13, 2021). "Halo Infinite ending explained — what just happened?". Tom's Guide. Archived from the original on December 15, 2021. Retrieved December 19, 2021.
- Lowry, Brendan (December 9, 2021). "Halo Infinite ending and post-credits scene explained". Windows Central. Retrieved December 19, 2021.
- Nylund, Eric (2001). Halo: The Fall of Reach. New York: Ballantine Books. p. 247. ISBN 978-0-345-45132-3.
- Staff. "Universe: Characters: Cortana". Halo Waypoint. 343 Industries. Archived from the original on June 23, 2017. Retrieved March 30, 2018.
- Crouse, Megan (January 26, 2016). "Halo: The Importance of Cortana & Halsey's History". Den of Geek. Dennis Publishing. Retrieved February 1, 2019.
- Crouse, Megan (October 28, 2015). "Cortana's Five Greatest Moments". Den of Geek. Dennis Publishing. Retrieved February 1, 2019.
- Skrebels, Joe (November 11, 2020). "Halo TV Series Recasts Cortana With Original Voice Actress". IGN. Retrieved February 24, 2021.
- Pham, Alex (November 15, 2001). "Game Design; Xbox Gets Its Wings With 'Halo'". Los Angeles Times. p. T6.
- Cullen, Johnny (February 2, 2011). "Bungie: 'Immersion was the main goal' in creating Master Chief". VG247. Videogaming247 Ltd. Archived from the original on February 5, 2011. Retrieved September 8, 2020.
- Lorraine Mclees (May 20, 2003). "Cortana's face was modeled after an Egyptian queen". Halo.Bungie.org. Archived from the original on July 17, 2011. Retrieved January 5, 2008.
- MacKay, Jill (2006). "The Modern Mythos". In Yeffeth, Glenn (ed.). Halo Effect: An Unauthorized Look at the Most Successful Video Game of All Time. Dallas, Texas: BenBella Books. pp. 92–93.
- Prell, Sam (October 28, 2015). "Why is Cortana naked? Halo franchise director Frank O'Connor has an answer". GamesRadar. Future Publishing. Archived from the original on August 12, 2016. Retrieved February 21, 2018.
- Haske, Steven (May 30, 2017). "The Complete, Untold History of Halo". Vice. Vice Media. Archived from the original on March 15, 2018. Retrieved March 27, 2018.
- Makuch, Eddie (March 29, 2013). "343 was 'skeptical' about Chief-Cortana story in Halo 4". GameSpot. CNET. Archived from the original on December 2, 2017. Retrieved December 5, 2017.
- Mitchell, Richard (April 2, 2013). "Halo 4 as a love story: The personal origins of Cortana's breakdown". Engadget. Oath, Inc. Archived from the original on December 2, 2017. Retrieved December 26, 2017.
- Peckham, Matt (November 6, 2012). "Ico Influenced Chief-Cortana Bond in Halo 4, Says Director". Time. Time USA, LLC. Retrieved September 9, 2020.
- Carmichael, Stephanie (November 30, 2012). "Interview: Halo 4's other story is found in its visuals". GameZone. GameZone Next. Archived from the original on December 2, 2017. Retrieved November 30, 2017.
- Davies, Paul (2013). "Cortana". Awakening: The Art of Halo 4 (Enhanced ed.). Gallery Books. ISBN 978-1781163245.
- Gaudiosi, John (October 20, 2012). "Meet the actress behind everyone's favorite AI, Halo's Cortana". Digital Trends. Designtechnica. Archived from the original on August 3, 2014. Retrieved December 26, 2017.
- Easterling, Jeff (February 5, 2016). "Canon Fodder #61: Judges & Jurys". 343 Industries. Microsoft. Archived from the original on December 26, 2017. Retrieved December 26, 2017.
- Peckham, Matt (October 29, 2015). "Halo's Frank O'Connor Reacts to Criticism of Halo 5". Time. Archived from the original on March 12, 2016. Retrieved March 27, 2018.
- Russell, Bradley (January 31, 2022). "The Halo TV series has its first big controversy: Cortana's new design". Games Radar.
- Ankers, Adele (March 15, 2022). "Halo TV Series Creators Respond to Controversy About Cortana's Redesign". IGN Southeast Asia.
- Russell, Bradley (March 14, 2022). "Why Cortana has been redesigned for the Halo TV series, according to the show's creative team". Games Radar.
- Benedetti, Winda (October 29, 2012). "The heart of Halo: Actress talks a decade spent playing Cortana". NBC News. NBCUniversal News Group. Archived from the original on March 27, 2018. Retrieved March 27, 2018.
- Jones, Jason; O'Donnell, Marty; and Staten, Joseph (September 25, 2007). Halo: Combat Evolved Developer's Commentary (Halo 3 Legendary Edition). Bungie. Event occurs at 37:00.—Staten: "Because originally you wanted Cortana to have a British accent." / Jones: "What?" / O'Donnell: "That's actually true because when we cast Cortana we asked every woman to do an English accent for us."
- Taylor, Jen; Staff (May 3, 2006). "SiN Episodes Voice Cast Interview". ritualistic.com. Archived from the original on November 14, 2007. Retrieved October 23, 2007.
- Taylor, Jen (narr.) (2007). The Cortana Chronicles (Halo 3 Legendary Edition). Bungie.
- K., Paul (February 16, 2007). "Bungie Weekly Update". bungie.net. Archived from the original on October 11, 2014. Retrieved October 16, 2007.
- MacKay, Jill (2006). "The Modern Mythos". In Yeffeth, Glenn (ed.). Halo Effect: An Unauthorized Look at the Most Successful Video Game of All Time. Dallas, Texas: BenBella Books. p. 95.
- "Joe Staten Interview". Halo.Bungie.org. August 2006. Archived from the original on December 11, 2007. Retrieved December 10, 2007.
- Staff (November 6, 2006). "Halo 3: Beyond the Trailer". GameTrailers. Archived from the original on May 5, 2009. Retrieved November 20, 2007.
- Ocampo, Jason (May 9, 2006). "E3 06: Halo 3 announced, plot details revealed". GameSpot. Archived from the original on October 20, 2012. Retrieved May 5, 2007.
- "Halo Action Figures, Series 1: Cortana". cmdstore.com. Archived from the original on November 12, 2007. Retrieved November 21, 2007.
- Szabo, Brooke (October 9, 2003). "Bungie Art Grrl McLees". Xbox.com. Microsoft. Archived from the original on October 11, 2014. Retrieved April 5, 2010.
- "Halo 3: Series 1". McFarlane. Archived from the original on February 7, 2008. Retrieved October 10, 2007.
- "McFarlane Halo Figures," GameInformer 180 (April 2008): 34.
- Konrad, Jeremy (January 22, 2018). "Funko London Toy Fair Reveals include Miraculous, Garbage Pail Kids, Sailor Moon, MOTU, and more!". Bleeding Cool. Retrieved January 22, 2019.
- "Catalog: Halo 4 Cortana". Funko. Archived from the original on January 22, 2019. Retrieved January 22, 2019.
- Pearce, Alanah (April 14, 2016). "11 of the Coolest Halo Toys Ever Made". IGN. Ziff Davis. Archived from the original on April 19, 2016. Retrieved March 28, 2018.
- Young, Liam (January 2019). "'I'm a Cloud of Infinitesimal Data Computation' When Machines Talk Back: An interview with Deborah Harrison, one of the personality designers of Microsoft's Cortana AI". Machine Landscapes: Architectures of the Post-Anthropocene. 89 (1): 112–117. doi:10.1002/ad.2398.
- Pitcher, Jenna (April 3, 2014). "Microsoft unveils Halo's Cortana as Siri-style Windows Phone digital assistant". Polygon. Archived from the original on June 10, 2014. Retrieved July 24, 2014.
- Pierce, David (March 3, 2014). "This is Cortana, Microsoft's answer to Siri". The Verge. Archived from the original on March 3, 2014. Retrieved July 24, 2014.
- Kastrenakes, Jacob (January 21, 2015). "Microsoft unveils Cortana for Windows 10". The Verge. Archived from the original on February 1, 2015. Retrieved February 1, 2015.
- Ash, Marcus (December 9, 2015). "Cortana: Now available where and when you need her, no matter what smartphone you choose". Windows Blog. Microsoft. Archived from the original on March 14, 2017. Retrieved March 27, 2018.
- Evan Saathoff (November 23, 2011). "Best Video Game Companions". UGO. Archived from the original on March 7, 2014.
- Staff (November 22, 2011). "Thanks Buddy!: 25 of Gaming's Greatest Sidekicks". Maximum PC. Future US. Archived from the original on March 10, 2013.
- Lozada, David (January 21, 2019). "The best video game sidekicks ever". Game Revolution. CraveOnline. Archived from the original on January 28, 2019. Retrieved January 28, 2019.
- Wright, Rob (February 20, 2007). "The 50 Greatest Female Characters in Video Game History". tomsgames.com. Archived from the original on January 20, 2008. Retrieved October 22, 2007.
- "50 Most Iconic Video Game Characters of the 21st Century". Glixel. November 23, 2016. Archived from the original on November 23, 2016.
- Evans, Monica (2011). "UNSC Briefing". In Cuddy, Luke (ed.). Halo and Philosophy: Intellect Evolved. Open Court. pp. 41–42. ISBN 978-0812697186.
- Staff (June 30, 2004). "Top Ten Xbox Babes". Team Xbox. Archived from the original on October 13, 2013. Retrieved April 27, 2014.
- Staff (March 26, 2008). "Top 50 Hottest Game Babes on Trial: #36. Cortana (Halo series)". GameDaily. Archived from the original on September 15, 2008.
- Karl, Ben; Rudden, Dave (October 5, 2007). "Top Ten Disturbingly Sexual Game Characters". games.net. Archived from the original on July 16, 2011. Retrieved October 12, 2007.
- "25 nhân vật nữ khiến các game thủ nam "mất tập trung" nhất". Thanh Niên Game (in Vietnamese). 2015. Archived from the original on August 28, 2015. Retrieved September 20, 2015.
- Knight, Rich (November 9, 2011). "Battle of the Beauties: Gaming's Hottest Female Characters Face Off". Complex. Complex Networks. Archived from the original on July 2, 2014.
- Staff (March 3, 2016). "Sarkeesian aims to make feminist theory more accessible". The Exponent. Montana State University. Archived from the original on March 26, 2018. Retrieved March 25, 2018.
- Sharkey, Scott (May 19, 2009). "Top 5 Insane Videogame computers". 1UP.com. Archived from the original on November 5, 2012. Retrieved May 20, 2009.
- Peckham, Matt (April 3, 2014). "Microsoft's Cortana Raises Important Questions About Sexism and Gender Stereotyping". Time. Archived from the original on February 6, 2015. Retrieved January 21, 2019.
- Myers, Maddy (October 30, 2015). "The (New) Canonical Reason Why Halo's Cortana Is Naked". The Mary Sue. Abrams Media. Retrieved September 1, 2020.
- Rougeau, Mike (November 1, 2012). ""Halo 4" Reviewed: Joy to the World, the Chief is Come". Complex. Complex Networks. Archived from the original on April 30, 2016. Retrieved March 27, 2018.
- Cardy, Tom (October 1, 2007). "Review: Halo 3 (Xbox 360)". Stuff.co.nz. Fairfax New Zealand.
- Ryan McCaffrey (November 1, 2012). "Halo 4 Review". IGN. Ziff Davis. Archived from the original on February 20, 2014. Retrieved December 26, 2017.
- Hoggins, Tom (November 5, 2012). "Halo 4 Review". The Daily Telegraph. Archived from the original on November 7, 2015. Retrieved December 7, 2017.
- Nowak, Peter (November 1, 2012). "Halo 4: A great game series extends win streak". The Globe and Mail. The Woodbridge Company. Archived from the original on February 2, 2013. Retrieved December 28, 2017.
- Parkin, Simon (November 1, 2012). "Halo 4 review; Truth or reconciliation?". Eurogamer. Gamer Network Ltd. Archived from the original on April 7, 2013. Retrieved December 28, 2017.
- Clouse, Justin (November 1, 2012). "Halo 4 Review". The Escapist. Defy Media. Archived from the original on June 18, 2017. Retrieved December 29, 2017.
- Thier, David (November 2, 2015). "Why Halo 5: Guardians Ending Was So Controversial". Forbes. Archived from the original on December 14, 2017. Retrieved January 8, 2018.
- Thier, David (October 27, 2015). "'Halo 5's' Biggest Twist Is Pretty Brilliant". Forbes. Archived from the original on December 7, 2017. Retrieved January 5, 2018.
- Dane, Patrick (November 2, 2015). "Yes, Halo 5's Story Matters And It's One Of The Best In The Series". Bleeding Cool. Avatar Press. Archived from the original on January 6, 2016. Retrieved March 26, 2018.
- Peckham, Matt (October 26, 2015). "Halo 5 Guardians Review; A Mediocre Story with Terrific Multiplayer". Time. Archived from the original on September 20, 2016. Retrieved March 1, 2018.
- Machovech, Sam (October 26, 2015). "Halo 5: Guardians review: Everyone's a hero, no one's a hero". Ars Technica. Condé Nast. Archived from the original on December 24, 2015. Retrieved March 27, 2018.
- Gach, Ethan (August 16, 2018). "Halo 5: The Kotaku Re-Review". Kotaku. Univision. Retrieved January 28, 2019.
- Wilds, Stephen (February 14, 2023). "Halo dropped the ball on Cortana's villainous turn". Polygon. Retrieved July 15, 2023.