A big ol' list

Games I've beaten:
Super Mario Brothers
SMB 2
SMB 3
Super Mario World
SMB 64
Zelda
Zelda II
A Link to the Past
Ocarina of Time
Windwaker
Metroid
Super Metroid
Metroid Prime
Mike Tyson's Punchout
Bionic Commando
Actraiser
Mario Kart
Mario Kart 64
Double Dash
Knights of the Old Republic
Mass Effect
BioShock
Gears of War
Oblivion
Kid Icarus
Kung Fu
Mega Man
MM 2
MM 3
MM 4
Final Fantasy 1-6
Castlevania
Simon's Quest
Fable
Sonic 2
Street Fighter II
Mortal Kombat 1-3
Soul Calibre 2
Halo
Halo 2
Star Wars Battlefront
SWB 2
Teenage Mutant Ninja Turtles 2
Life Force
Contra
Gradius
Top Gun
Final Fantasy Mysitical Quest
Ninja Gaiden
NG 2
Jackle
Ikari Warriors
Commando
Rambo
Star Wars Episode Three
Call of Duty 4
Half Life 2
Portal
Tron
Goonies II
Battle of Olympus
Master Blaster
Star Wars Arcade
Fight Night 3
Burnout Revenge
Paper Mario
Paper Mario and the Thousand Year Door
Super Smash Brothers
Super Smash Brothers Melee
Resident Evil 4
Bubble Bobble
Doom II
F-Zero
Star Fox
Tony Hawk
Quake
Harvest Moon
Beautiful Katamari
Perfect Dark
Golden Eye
Yoshi's Island
Ogre Battle
Tecmo Super Bowl
Double Dragon 1 & 2
Duck Tails
Chip and Dale's Rescue Rangers
Aladin
Super Star Wars
Super Empire Strikes Back
Super Return of the Jedi

And I'm done. Thanks to Cameron for this idea. I'm sure they're will be more that I will think of and have to add later.