I couldn't resist playing some Gundam Rise from the Ashes (best gundam game with no gundams in it) and Marvel vs Capcom 2 (I suck at that game). Took me for a ride it did. And of course, Sonic Adventure. The intro song, and the part of the intro where Chaos sticks its head through a building and some Japanese dude is screaming gives me chills.
Deep Fighter, House of the Dead 2, Starlancer, Armada, Toy Commander, and more... no one will forget... until everyone's dead.