Outlaws is a first-person shooter released by LucasArts in 1997.
 It is one of the very few first person shooter games with a Wild West setting.
 It follows retired U.S. Marshall James Anderson, who seeks to bring justice to a gang of criminals who killed his wife and kidnapped his daughter.
 It uses an enhanced version of the Jedi game engine, first seen in "".
 It is also largely credited as the first shooter game with a sniper zoom, as well as one of the first to feature a gun reloading mechanic.
 LucasArts' INSANE animation engine was used to render computer graphics animation sequences.
 These have special filters to look hand-drawn, and play between each mission and set up the action in the next area.
Postal is a shooter game franchise created by Running With Scissors, known for its excessive violence and controversial content.
 Each game is set in a different genre; "Postal" is isometric, "Postal 2" is a first-person shooter and various spin-off titles were in genres such as third-person shooter and top-down shooter.
 A film adaptation simply titled "Postal" was also produced by German director Uwe Boll.
Games for Windows – Live or GFWL (trademarked as Games for Windows – LIVE) was an online gaming service used by "Games for Windows"–branded PC titles that enables Windows PCs to connect to Microsoft's Live service.
 Users, each with a unique Gamertag (the Microsoft username service for gaming that began on Xbox Live), are able to play online, keep track of their friends' status, send and receive messages, gain and keep track of Achievements and associated Gamerscore, voice chat across platforms (removed in 2010), and much more.
 Some games allow for cross-platform play, such as "Shadowrun", putting Windows players against Xbox 360 players.
Severity is a canceled first-person shooter video game that was being developed by Escalation Studios for Microsoft Windows, PlayStation 3, and Xbox 360.
 Funded by the Cyberathlete Professional League (CPL), the game was set to include a blend of different first-person shooter gameplay styles, separating them as individual game modes, as well as cross-platform multiplayer.
The Unreal Engine is a game engine developed by Epic Games, first showcased in the 1998 first-person shooter game "Unreal".
 Although primarily developed for first-person shooters, it has been successfully used in a variety of other genres, including stealth, MMORPGs, and other RPGs. With its code written in C++, the Unreal Engine features a high degree of portability and is a tool used by many game developers today.
 It has won several awards, including the Guinness World Records award for "most successful video game engine."
Soldier of Fortune: Payback is a first-person shooter video game and the third installment of the "Soldier of Fortune" game series.
 Unlike the previous two "Soldier of Fortune" games, which were developed by Raven Software utilizing the id Tech 2 and id Tech 3, "Payback" was developed by Cauldron HQ, developed with Cauldron's in-house CloakNT engine, used in their previous first person shooter game, "Chaser".
 It is the first game of the series released for the Xbox 360 and PlayStation 3.
 The game was released on 14 November 2007.
EVE: Valkyrie is a multiplayer dogfighting shooter game set in the "EVE Online" universe that is designed to use virtual reality headset technology.
 Originally launched for Microsoft Windows for use with the Oculus Rift virtual reality headset, CCP Games has announced they plan to enable cross-platform play between the three major VR systems: the Oculus Rift, the HTC Vive, and the PlayStation VR.
 Released in March 2016, the game has two game mode options: Chronicles can be played in single player, while Combat allows eight by eight combat PvP (player versus player) missions.
 Reviews generally criticised the limited plot and limitations of single player mode, although the described "arcade experience" was praised for having intuitive controls and "exhilarating" dogfighting features, with "PC Powerplay" dubbing it "arguably the best VR experience currently available for the [Oculus Rift] platform."
Vivisector: Beast Within is a Ukrainian made first-person shooter game released in Europe in 2006.
 Inspired largely by the movie "Island of Lost Souls" and the story "The Island of Doctor Moreau", which the movie was based on, the game is set in 1987 on a covert military installation on Soreo Island, where a riot has broken out by renegade geneticist Dr. Morhead's experimental human-animal hybrid soldiers against the corrupt general that ordered their creation.
 It is the player's job, initially, to help the General suppress the riot and regain control of the hybrid soldiers, but the player eventually switches sides against the General halfway through the game.
 The game is most infamous for its "vivisection point" feature, which allows the player to rend an enemy's flesh from their body with each shot (though, due to Germany's strict censor laws, this feature was removed for the human NPCs).
 This game came out of the cancelled "Duke Nukem: Endangered Species Hunter" title.
FASA Studio (formerly FASA Interactive Technologies Inc) was a video game developer that was founded in 1995 by the tabletop game company FASA Corporation, Spectrum HoloByte and Denny Thorley, Morton Weisman, Jordan Weisman, and L. Ross Babcock.
Shadowrun is a first-person shooter video game, developed by FASA Studio for Xbox 360 and Windows Vista.
 It was later cracked to work on Windows XP, confirming speculation that it was intentionally limited to Windows Vista.

Question: Which first-person shooter game that was developed by FASA studio allows cross-platform play?
Answer: Shadowrun