Well back in the DOS days; DOOM, Wolfenstien 3D, Quake, DOOM II. Then moving on to Windows; War Craft, Star Craft, Half-Life, Quake III Arena, Unreal Tournament, Diablo, Hellfire, Baldur's Gate, Counter Strike, Day of Defeat, Dungeon Keeper, Command & Conquer, Half-Life 2, CS: Source, DoD Source, Diablo II, Borderlands, Uplink, Portal, Portal 2, Left 4 Dead 1&2.
Then on consoles NES: Mario Bros, Duck Hunt, Links, Zelda, Dragon Warrior. Sega Genesis: Sonic the Hedge Hog, Sonic 3, Sonic Pinball and I cant remember the few others that I had.