Portal

Valve, the makers of the Half-Life series, is apparently going to bundle this mod with their next release, which should be Half Life 2: Episode 2. The name of the mod is Portal. If you've played the Prey demo this will look somewhat familiar. I hope it turns out to be a thinker game rather then a shoot'em up FPS. The market already has too many FPS's and most of them suck ass!