I think it was called Alien Soldier, you're like some white bird-looking dude blasting all these aliens, on Sega Genesis I think. I didn't actually play it on the Genesis, a family member just had it on his computer and introduced me to emulated stuff.
So I'm sitting there playing the whole night, 13 years old, listening to a loop of Baby Got Back for 8 hours till I beat the game. It was awesome.
That, and playing Battlefield 2: Modern Combat + Ace Combat 4 with my nephews for the week I was at their house. Never knew a game could have such epic music like Ace Combat, sure do love that stuff I do. Favorite track of all time has got to be Liberation of Gracemeria from Ace Combat 6.
Kinda went off on a tangent there..