Whats your favorite games for every system you have ever had?

Genesis- That game where you could turn into a werewolf.(forget the name) It was the game that came with sytem.
Nintendo-Contra ( just putting in the cheat code was fun)
N64- Mario Kart
PS1-Twisted Metal 2
PS2-GTA Vice City
XBOX-Splinter Cell
360- Call of Duty 4
And of course Madden for all systems