one of the Bugs Bunny Crazy Castles, not sure exactly which one. Gosh, I remember that I randomly knew a code (I think I just randomly got it by typing something random in it), and like getting way further in the game. Without it, I only got to like 10 levels before dying. Got to remember I was three.
But my first Mario game has to be Super Mario 64.
EDIT - It was Bugs Bunny Crazy Castles 3. I just youtubed it and I instantly remembered the first level. To be honest, I sucked at that game; always hated how Daffy Duck would make you lose a life if you touch him.
The Gameboy Color/Advanced/SP, the original Playstation, and the Sega Dreamcast are among the earliest of my gaming memories. I remember several games, but as for the first one, I do not know.
Bump because I wanted to make a thread about this but it already exists,
while I don't exactly remember which the first game I ever played was, I recall playing both Crash Team Racing and Worms Armageddon for the Psone and Command & Conquer 2: Tiberian Sun for the glorious Win98 a lot in my early childhood.
IT was either Super Mario Land for the Game boy or Super Mario Bros. 3 for the NES. Man, sometimes I feel really old when I compare my first to other people's first.