NES:
The Legend of Zelda
Kirby's Adventure
Castlevania III
GB:
Metroid II
Legend of Zelda: Link's Awakening
Dragon Quest III
SNES:
Chrono Trigger
Super Metroid
Seiken Densetsu III
Neo Geo:
Metal Slug
N64:
Goldeneye 007
The Legend of Zelda: Ocarina of Time
Paper Mario
PSX:
Castlevania: Symphony of the Night
Suikoden II
Final Fantasy VIII
GC:
Super Smash Bros Melee
Resident Evil Remake
Resident Evil 4
PS2:
Dragon Quest VIII
Suikoden III
DS:
Kirby's Canvas Curse
Dragon Quest V
Osu! Tatakae! Ouendan!
Wii:
Muramasa: The Demon Blade
Super Mario Galaxy
PC:
The Oregon Trail
Tie Fighter
Indiana Jones and the Fate of Atlantis
Sim City 2000
Sim Copter
Roller Coaster Tycoon
Diablo II
Age of Empires II
Counter-Strike
Battlefield 2
Those are all the truly memorable games I have played, based on when I played them and platform they're on.