System Shock 2

You awake from the cold chill of your cryo-tube to discover cybernetic implants grafted to your flesh and the crew of the starship Von Braun slaughtered. The infected roam the halls, their screams and moans beckoning you to join them as the rogue artificial intelligence known as SHODAN taunts and ridicule your feeble attempt to unravel the horrifying mystery of the derelict starship Von Braun.

Features:

• Choose from 3 specialized branches of the military to utilize unique skills, weaponry, and paranormal psionic powers.
• Upgrade and enhance your skills to improve hacking, weapon proficiency, and psionic abilities.
• Discover cryptic audio logs, encounter ghostly apparitions and conduct research to give you the advantage in combat and unlock exotic weapons and items.
• Play with up to three friends in multiplayer co-op (co-op works in Windows only)