System Shock 2 is a 3D sci-fi shooter with a horror theme, and recently it has been made available for Linux as well on the Steam platform for $9.99.
System Shock 2 is a game that was initially released back in 1999, and takes place in the future, on board a spaceship, combining first-person elements with role-playing style, where the player can gain traits and upgrades.
Although an old title, System Shock 2 makes a decent addition to an already fast increasing list of Steam titles for Linux.