Hexen II is a dark fantasy first-person shooter video game developed by Raven Software from 1996 to 1997, published by id Software and distributed by Activision.
 It was the third game in the ""/"Heretic" series, and the last in the Serpent Riders trilogy.
 It was made available on Steam on August 3, 2007.
 Using a modified "Quake" engine, it featured single-player and multiplayer game modes, as well as four character classes to choose from, each with different abilities.
 These included the offensive Paladin, the defensive Crusader, the spell-casting Necromancer, and the stealthy Assassin.
Gravity Bone is a freeware first-person adventure video game developed by Blendo Games, and released on August 28, 2008.
 The game employs a modified version of id Software's id Tech 2 engine—originally used for "Quake 2"—and incorporates music from films by director Wong Kar-wai, which were originally performed by Xavier Cugat.
 Four incarnations of the game were produced during its one-year development; the first featured more common first-person shooter elements than the released version.
 Subsequent versions shifted in a new direction, with the inclusion of more spy-oriented gameplay.
Wolfenstein 3D is a first-person shooter video game developed by id Software and published by Apogee Software and FormGen.
 Originally released on May 5, 1992 for MS-DOS, it was inspired by the 1981 Muse Software video game "Castle Wolfenstein".
 In "Wolfenstein 3D", the player assumes the role of Allied spy William "B.J." Blazkowicz during World War II as he escapes from the Nazi German prison Castle Wolfenstein and carries out a series of crucial missions against the Nazis.
 The player traverses through each of the game's levels to find an elevator to the next level or kill a final boss, fighting Nazi soldiers, dogs, and other enemies with knives, pistols, and other guns.
Doom II: Hell on Earth is a first-person shooter video game, the second title of id Software's "Doom" franchise.
 It was originally released for MS-DOS computers in 1994 and Macintosh computers in 1995.
 Unlike "Doom", which was initially only available through shareware and mail order, "Doom II" was a commercial release sold in stores.
 "Master Levels for Doom II", an expansion pack that includes 21 new levels, was released on December 26, 1995 by id Software.
Marty Stratton is an executive producer and game director for Id Software.
 After joining Id Software in 1997, Stratton became the Director of Business Development, overseeing the company's interests in European markets.
 In 2006, he became responsible for the overall development of "Quake Live", "Rage", and "Doom" with ZeniMax Media and Bethesda Softworks respectively.
 Prior to his arrival at Id Software, Stratton previously worked for Adeline Software International and Activision in Quality Assurance on "Time Commando" and "".
Hexen: Beyond Heretic is a dark fantasy first-person shooter video game developed by Raven Software and published by id Software through GT Interactive Software on October 30, 1995.
 It is the sequel to 1994's "Heretic", and the second game in Raven Software's "Serpent Riders" series.
 The title comes from the German noun , which means "witches", and/or the verb , which means "to cast a spell".
 Game producer John Romero stated that a third game in this series which was never released was to be called "Hecatomb".
Rage (stylized as RAGE) is a first-person shooter video game developed by id Software, released in October 2011.
 It was first shown as a tech demo on June 11, 2007, at the Apple Worldwide Developers Conference, and was officially announced on August 2, 2007 at QuakeCon.
 "Rage" uses id Software's id Tech 5 game engine, and was the final game released by the company under the supervision of founder John Carmack.
Doom is a first-person shooter video game developed by id Software and published by Bethesda Softworks.
 A reboot of the "Doom" franchise, it is the fourth title in the main series and the first major installment since "Doom 3" in 2004.
 It was released worldwide on Microsoft Windows, PlayStation 4, and Xbox One on May 13, 2016 and is powered by id Tech 6.
 A port for Nintendo Switch developed by Panic Button is scheduled for release in Q4 2017.
Quake 4 is a military science fiction first-person shooter video game, the fourth title in the "Quake" series.
 The game was developed by Raven Software and published by Activision.
 Raven Software collaborated with id Software, the creators and developers of preceding "Quake" games.
 id Software supervised the development of the game as well as providing the id Tech 4 engine upon which it was built.
 "Quake 4" went gold in early October 2005 and was released on 18 October 2005 for Microsoft Windows and later for Linux, Xbox 360 and OS X.
 A special DVD Collectors Edition was released, including promotional material and the game "Quake II" with its expansions, "The Reckoning" and "Ground Zero".
 The Xbox 360 version of "Quake 4" is based on the Special Collectors Edition, and includes "Quake II".
 On 4 August 2011 the game was made available through Steam.
Star Trek: Elite Force II is a first-person shooter video game developed by Ritual Entertainment and published by Activision.
 It was released on June 20, 2003 for Microsoft Windows and later for Apple Mac OS X.
 "Elite Force II" is a sequel to 2000's "".
 Whereas the original game was powered by the first version of id Software's id Tech 3 engine, "Elite Force II" is based on a heavily modified version of the "Quake III: Team Arena" engine with Ritual's ÜberTools GDK, allowing for expansive outdoor environments and higher quality facial animations.

Question: In 2006, Marty Stratton was responsible for the overall development of what first-person shooter video game developed by id Software?
Answer: Rage