6. Super Mario Bros.
This is it, the game that started my video game addiction! If only my parents had had the foresight of this, I'm sure they would have smashed the NES cartridge (and the NES) and given me a football instead. But alas I will always love this game, no matter how many times the princess seems to be in another castle.
Everything about this game was brilliance, even the underwater stages and we all know how much we hate those (I'm looking at you Sonic). And the first time you discovered a bean stalk leading to a cloud level, or a warp zone... gaming bliss! Oh, and the awesome iconic powerups!