original half life is good, and i actually saw it for 7 bucks retail too. FEAR is overated a bit, but i cant seem to stop playing it. I highly recommend Call of Duty, really great game. And if all the games mentioned dont row your boat, there is always good old DOOM .
duke nukem, hahahaha. man, Half life 2. you CANNOT go wrong with it. i love it to death. or maybe F.E.A.R...i don't have it, and actually don't know why. but i've played it countless times and it rocks