Goldeneye 007
Supersmash Brothers
Starcraft
CS
HL
Soul Caliber 2
Madden 94' for genesis (just because you do an all streak and throw it to your TE every play and get a TD hahaha)
others but i dont feel like thinking or looking at what other people wrote right now lol...maybe later
I just played some more HL2, being stuck on a little puzzle (had to check a online guide ), taking on the chopper was hella lot of fun!,the musical scores, matched what you were doing eg. intense music when taking on the chopper and when you get off off the boat to solve a mini puzzle, it's all eerie. It was the PERFECT blend of , action , thrill , and puzzle solving, i acutally liked doing the puzzle solving, because it gave you a break from that damn annoying chopper!. And you gotta love your fellow citizens, there a major help. Now, i can't wait to play another session of HL2!
Zelda series, esp. Ocarina of Time
Gran Turismo series
Microsoft Flight Simulator series
Half-Life 2 is good as well, never played through 1 and haven't beaten 2 yet, but as far as the work put into that game is involved, I'd say that's just about #1 hands down.
Epic Games and Microsoft have no plans to bring Gears of War to the PC. Becides, the controls using the Xbox 360 controller flow WAY better than PC controls do (which is rare).