For NES I liked Battletoads and Super Contra
For SNES Donkey Kong Country
For N64 This is another I can't believe people havent named 007, I played that all the time with my friends back in the day
For PS Metal Gear
For PS2 Gran Tourismo or Tony Hawk
For PC Any of the Civilizations, Half Life, Unreal, Dungeon Master, Starcrat, Diablo, and my first FPS online game Quake!