|Type||Subsidiary of 2K Games|
|Industry||Computer and video games
|Headquarters||Quincy, Massachusetts, United States|
|Key people||Ken Levine
Irrational Games (known briefly as 2K Boston, Inc./2K Australia Pty. Ltd.) is a video game developer founded in 1997 by three former employees of Looking Glass Studios: Ken Levine, Jonathan Chey, and Robert Fermier as Irrational Games. On January 9, 2006, Take-Two Interactive announced that they had purchased Irrational, and would publish their games under the 2K Games label.
The Canberra studio (2K Australia) separated from the Boston studio at some point after 2007, and merged with 2K Marin in 2010.
In late July 2010, several media outlets reported that a recently created website, whatisicarus.com, was a promotion relating to Irrational Games' unannounced project. The following week, information about the game was again teased, with the trailer confirmed for release on August 12, 2010. It turned out to be BioShock Infinite.
- 1997 – Boston studio formed by former Looking Glass Studios employees Ken Levine, Jonathan Chey, and Robert Fermier.
- 1999 – System Shock 2 released to critical acclaim.
- 2000 – Irrational Canberra opens, with Jonathan Chey taking the helm. Deep Cover is cancelled.
- 2002 – Legal issues with publisher Crave Entertainment result in the development of The Lost being halted.
- 2004 – Irrational designers Ed Orman and Dean Tate awarded "Best Design" in the Australian Game Developer Awards, as well as the studio receiving "Best Game of 2004" and "Best PC Game".
- 2005 – Irrational's Boston studio moves to larger office space in Quincy, Massachusetts. The studio retains the "Irrational Games Boston" title.
- 2006 – Irrational is acquired by Take-Two Interactive, under the 2K Games publishing arm.
- 2007 – Irrational Games is renamed to 2K Boston and 2K Australia on August 10. BioShock released August 21 to wide critical acclaim and strong sales.
- 2010 - 2K Boston announces its return to its original name, "Irrational Games" on January 8. 2K Australia merges with 2K Marin and announces XCOM on April 14.
Shortly after BioShock was released, rumors arose that many of the staff who had worked on the game were leaving 2K Boston/Australia. In 2007, five members of the 2K Boston team moved to a new 2K Games studio in Novato, California. Soon after, 2K Games announced the formation of 2K Marin in Novato.
List of video games 
|1999||System Shock 2||—||—||Yes||—|
|2005||Freedom Force vs the 3rd Reich||—||—||Yes||—|
|2006||SWAT 4: The Stetchkov Syndicate||—||—||Yes||—|
Cancelled video games 
- Deep Cover
- Division 9
- Monster Island
- The Lost
- Totilo, Stephen. "BioShock Creators’ Next Game Debuts Next Week, Trailer On Aug. 12". Kotaku.
- "Irrational Games Renamed 2K Boston and 2K Australia". Business Wire. 2007-08-10. Retrieved 2010-09-16.
- The Return Of Irrational Games
- Plunkett, Luke (2010-04-16). "2K Studio Name Madness Continues With New XCOM Game". Kotaku Australia. Retrieved 2010-04-28.
- "Q&A: Ken Levine talks BioShock, reminisces about X-Com". GameSpot. 2009-03-20. Retrieved 2009-04-09.
- "Take-Two confirms 2K Marin". GameSpot. 2007-12-17. Retrieved 2009-04-09.
- Irrational Games (US)
- Irrational Games (AU)
- 2K Boston (Quincy, Massachusetts)
- 2K Australia (Canberra, ACT)
- Irrational Games profile on MobyGames