Hmmm, are we talking console or computers? Video-game were first derived from the term, video cartidge, which means, its an entertainment system built to play game catridges on your television. However the term videogame can now mean pc-gaming as well...
Either way for the computer it was: C&C series up to ra2 and Diablo + Diablo II.
For video game, i would say, Metroid 3, Zelda 3, and Final Fantasy 1-3 (Japan 4-6), Starfox 1+2
"Anyone can write, only a literary genuise can entertain."