For the first time ever, System Shock has been rebuilt from the original source code as a FREE update to all owners of the game!

Re-discover what made System Shock the first of it's kind, a ground breaking immersive sim that would inspire a generation of games to come....

Twenty one years after its first release, System Shock is back!

System Shock: Enhanced Edition features:

Higher resolution support up to 4K widescreen mode
Mouselook support
Rebindable keyboard/mouse/joystick commands
Adapted to Nightdive's KEX engine
Support for both Direct3D and OpenGL
Option to switch between hi-resolution Mac assets and the original DOS assets
Official support for fan missions and fan mods
New unified options menu that allows changing preferences before gameplay
Adjustable FOV (Field of View)
Smoother camera rotation and translation
Improved control scheme which allows faster and streamlined experience
Brand new achievements
Remappable keys with three profiles to choose from: original controls, custom controls, and lefthanded controls.
Many original game bugs fixed.

A first-person fight to the death in the depths of space.

You're a renowned hacker, the most notorious cyberspace thief in the corporate world. Caught during a risky break-in, you become indentured to Diego, a greedy Trioptium exec who bankrolls a rare cyberjack implant operation. After six months in a healing coma, you awaken to the twisted aftermath of a terrible disaster. Where are the surgeons? Why is the station in such disrepair? Slowly, the chilling realization that something is very wrong creeps over you.
Once a prime corporate research facility, Citadel now teems with mindless cyborgs, robots and terribly mutated beings, all programmed to serve SHODAN, a ruthless A.I. There's scarcely time to think before it unleashes the first terror...

Gameplay features:

Rocket through cyberspace to steal information, hack security and grapple with watchdog defense programs enslaved to a maniacal computer.
Survive battle after battle against armies of killer cyborgs and deadly robots as you collect hardware attachments, life-sustaining patches and deadly weapons to combat mindless mutants.
Test your intelligence by solving puzzles, rewiring access panels and outwitting SHODAN in its own cyber-realm.
Enjoy the vastly improved controls and graphics of the Enhanced Edition - or keep your experience as close to the original as possible with the Classic version.

Included Extras located in your Steam\SteamApps\common\SS1EE\Bonus Content folder!