Plot: Doom is a 1993 first-person shooter game developed by id Software for MS-DOS. Players assume the role of a space marine, popularly known as Doomguy, fighting his way through hordes of invading demons from Hell. Wikipedia
Plot: Toxikk is a first-person shooter video game by Hanover, Germany-based software developer Reakktor. The game is built on the Unreal Engine 3 and is currently in beta. The beta was released for Windows via Steam Early Access on 22 January 2015. Wikipedia