It's a bit hard to remember, 'cus it was probably like 15 years ago. I'm guessing it was something on the old Gameboy. You know the one which looked like this:
Not some silly sequel to it with colours and stuff. Colours are for losers >_>
I remember playing a game on it called Kwirk. You played as a tomato with sunglasses, and you were trying to get out of a maze consisting of several levels.
Most likely, Tetris on some generic portable console-thingy. Heretic, Sid Meier's Colonization and Monkey Island 2 are the ones I can remember first playing on PC.
hmmm... the first game i played was super mario for that gameboy imogwai showed. i actually still own that gameboy and it works XD. but the first video game i actually played was sonic the hedgehog for sega. the mario one i played on someone elses gameboy for a few min.