Great Free Stealth Game!

http://www.stealthbastard.com/

" Hide in the shadows with a real-time shadowing system!
Evade a wide range of eagle-eyed lethal robotic foes!
Hack your way to the exit... and to the next challenge!
Squeeze through doorways mere seconds before you're sliced into pieces!
Die in a variety of gruesome, cruel ways!
Create your own fiendish deathrooms and share them with the world - all in the game!
Shave seconds off your playtimes and rule the global leaderboards!"

It's free too! Thanks to Gintoki the Mayo for reccomending this to me! Great game!