Halflife 2, + all expansions, Dead Space, DEAD SPACE 2, AVP2, F.E.A.R, + all expansions, Starship Troopers, UT2004, Garrys Mod lots of fun Too!
Here is a updated video of Frosty aliens predators SE Playing with Zero mod by 00
I had to compress the video to get it under the 400 file limit size its quality of video not the best but it gives you a better play through than previous versions.