Doom: When me and my brothers had accompany my dad to his work at weekends we had an entire IT floor to our selves, all networked and all with doom. Those were great days, filled with fragging, swivl chair races and a free drink machine. Doom, the game that problay started all PC gaming for me.
Red faction: Place called Computer Exchange in the city where I live had a upper floor with 20 or so PC that had a load of games installed on them, again networked up. Me and my frieneds would go down there most saturdays and play red faction for hours on end.
Tiburun sun: The first game i realy played online. And by that i mean The first game i ever played online.
Monkey Island 1-2: 2 was mainly my thing but me and my brother would sit for hours trying to figure out puzzles.
Sonic 1-3 +(S+K): What do i have to say expect God Bless sega! These were the shinnzle y'all.
Super mario world 1 (and Up to and inculding the first wario one to a lesser extent): I would play these at my grandmas on the orignal game boy, when that was the hight of technolgy
Rainbow Island: Ah the amiga. Old days for me. The last boss was unkillable! Recently picked it up and finaly completed it removing some (But not much of the magic)
Almost any 64 game: nuff said, opened me up to so many differnet genres
Bomerman on the Snes: We used to go round to our neighbores and realy play that game
Extras that havent changed my life but i love
Dawn of war (And WA)
Total war series
Half life and its comerical mods (Mainly CS)
Red alert series
Golden Eye (The funnist game ever)
Perfect dark (The most perfect FPS ever and wont be topped in my book for a long time i reacon)