RPG: Chrono Trigger
ARPG: Kingdom Hearts 2
WRPG: Oblivion
SRPG: Disgaea
Adventure RPG: Twilight Princess (Didn't know what else to categorize zelda as)
Stealth Action Game: Metal Gear Solid: The Twin Snakes. I liked the remake more... although it was easier. Lol. It was hard playing Extreme Sneaking only though...
Stealth Platformer: Sly Cooper.
Platformer: Super Mario Allstars
Figthing Game: Soul Calibur 3... or melee. Nah. Soul Calibur 3
Racing: GT5 Prologue or Mario Kart DS
Strategy Game: Warcraft III... woulda said Starcraft, but nah
Puzzle Game: Meteos
MMO: Screw that. People with lives don't play MMOs.
Sports Game: Fight Night Round 3

All time favorite: Pong....

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*moonwalk*? damn... no moonwalk yet. Until then