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Sega Saturn cover art of Hyper Duel
Hyper Duel is a horizontal scrolling shooter video game developed by Technosoft. It was originally released in 1993 for the arcade in Japan; it was later released for the Sega Saturn console on November 22, 1996 in Japan only. The game is not widely known because it was not released elsewhere. Hyper Duel largely resembles the Thunder Force series, also developed by Technosoft.
The game's story is not well known, as there is no English translation, but apparently it follows the archetypical shooter plot. A militant/alien group is threatening Earth and in response, Earth sends a unit of elite machines dubbed "Buster Gears” in order to defend itself. Thus, you assume the position of one of three pilots: Keith Spader, Lisa Rowling, or Dr. B. Lloyd. You then embark to defend the Earth through a series of several battlefields.
The Buster Gears are seemingly the typical fighter spaceships with various upgradeable weapons systems in the "Fighter" mode, but they can transform into an "Armor" mode, a humanoid warrior robot with several heavy fire arms. The Fighter mode is easily maneuverable, small, and fast; it also shoots straight in front of it. The Armor mode, on the other hand, is slower, bigger, and less responsive; it is capable of shooting up and down at a 45 degree angle, as well as straight. The firepower of the Armor mode is also superior. The weaponry of both modes can be upgraded by collecting P items which appear from defeating enemies. The ships can also acquire helper units by collecting either the T or G items. The Tracer unit is similar to the Fighter mode and it shoots forward when closing in on an enemy, while the Gunner unit is similar to the Armor mode and it homes on enemies. Both units also act as destructible shields.
Buster Gears change mode by pressing the alternate button. There are two buttons, one for the Fighter mode and one for the Armor mode. Pressing both buttons results in the activation of a special attack, involving two units that appear above and below the Buster Gear. In Fighter mode, they are stationary and shoot in a circular manner. In Armor mode, the units rotate around the ship and provide forward cover fire. This special attack depletes the special attack meter and when it runs out, the units stop firing. The meter is filled up by unit inactivity and by collecting B items.
Gameplay is similar to other Technosoft scrolling shooters, particularly the Thunder Force series. There are 8 stages in total. Stages consist of traveling through a scenario infested with enemies, which drop the various items aforementioned. Sometimes, there are minibosses, but there is always a rather large boss at the end of the stage. Defeating these bosses requires quick reactions and exploiting an inherent weakness. Enemies that are defeated yield points and upon completing a stage, several point bonuses are awarded. Extra lives are gained by acquiring a certain number of points. Unique to Hyper Duel is a ranking system, based upon how many P items have been acquired. The higher the number of upgrades the Buster Gear collects, the higher the number of bullets and shots on the screen.
Differences between versions
The Saturn version contains an original "Arcade Mode," a practically arcade-perfect conversion of the original, as well as an updated "Saturn Mode." In addition to including a new 3D opening cinematic, Saturn Mode also has cleaner, brighter, and more detailed sprites and backgrounds, even redrawn in some cases. The character select screen features 3D models of the Buster Gears. Certain animations are also smoother and redone to seem more 3D, particularly for the first boss. There are also some enhancements on the gameplay. For example, the Armor mode can lock its aim with the addition of a new button, allowing for independent aiming, a feature that was not present in the arcade version. Certain aspects of the game were also made harder. Overall, the Saturn version has more features.
The soundtrack of Hyper Duel was composed by Hyakutaro Tsukumo of Thunder Force V fame. While the original arcade soundtrack used the native sound equipment of the arcade machine, the Saturn version boasts an arranged soundtrack that is CD quality.
On May 1, 1997, the Saturn soundtrack was released by Technosoft in the album “Technosoft Game Music Collection Vol. 6: Sanctuary.” Included were also four Thunder Force III arranges. The track list is as follows: 
- Buster Gear (ST1)
- Void Kraken (BS1/7)
- Over Drive (ST2)
- Crybringer (BS2)
- Hidden Moon (ST3)
- I.W.A.O. (BS3)
- Cosmo Babylon (ST4)
- Black Angel (BS4)
- Count Down (ST5)
- Black Rain (ST6)
- Nightmare (BS6)
- Night Sweeper (ST7)
- Bloody Government (ST8)
- Hyper Duel (BS8)
- Negative Power (ED)
- Congratulation!! (RNK)
Thunder Force 3
- Back to the fire (ST1 arr)
- Venus fire (ST2 arr)
- Truth (ST3 arr)
- His behaviour inspired us with distrust (ST6 arr)
On March 28, 2006, the soundtrack saw another release in the Factory Noise & AG album "Absolute Area -project Thunder Force VI-." The Saturn tracks were remastered and packaged with several new arranges, as well a Thunder Force III arrange. The track list is as follows: 
- Cyber Fleet (Stage 1)
- Boiled Kraken (Boss 1&7)
- Full Burner (Stage 2)
- Cry Bringer (Boss 2)
- Hidden Moon (Stage 3)
- I.W.A.O (Boss 3)
- Cosmo Babylon (Stage 4)
- Black Angel (Boss 4)
- Count Down (Stage 5)
- Black Rain (Stage 6)
- Nightmare (Boss 6)
- Night Sweeper (Stage 7)
- Bloody Government (Stage 8)
- Hyper Duel (Boss 8)
- Negative Energy (Ending)
- Cyber Fleet (arrangement version)
- Black Rain (arrangement version)
- Cosmo Babylon (arrangement version)
- Night Sweeper (arrangement version)
- Venus Fire (arrangement version from Thunder Force 3)
- Brownlee, Paul. "Hardcore Gaming 101: Hyper Duel" (html). Hardcore Gaming 101. Retrieved 2010-02-04.
- "Technosoft Game Music Collection Volume 06 ~ Sanctuary". Game Music Revolution. Archived from the original (html) on October 25, 2007. Retrieved 2007-10-30.
- "Absolute Area -project Thunder Force VI-". Game Music Revolution. Archived from the original (html) on October 30, 2006. Retrieved 2007-10-30.
- Satakore.com Hyper Duel Satakore.com has an entry on the game that has many pictures and a movie clip as well.