Tetris... or SuperMarioLand for my Big-ass Gameboy, i dunno which one's older...
either that or some games i've been robbed, along with my megadrive, i remember having Eternal Champions, that Jumping Dolphin and another game i can't recall the name...
and my 1st PC game was Command & Conquer Tiberian Sun...
awesome it was,
Then followed by Age of Empires II
even better !
and then i had as a gift from my dad, a HUGE GREAT GAME, that never had it's deserved recognition: IMPERIUM GALACTICA II with Espionnage, Diplomacy, Ship gadget/guns Customization; fleet & planetary constructions, and views in 3D at the Time! etc.
and it's still awesome.