Game Boy Advance

Backyard BaseballIncrease Player Statistics03/08/04
Super Mario AdvanceChange the Green Yoshi to red at the title screen10/03/03
Super Mario AdvanceEarn Mario Heads (Mario Bros.)11/17/03
Super Mario Advance 4: Super Mario Bros. 3Earn Point Stars (Mario Brothers)11/06/03
Super Mario World: Super Mario Advance 2Earn Point Stars (Mario Brothers)11/17/03
Yoshi's Island: Super Mario Advance 3Lucky 7's11/17/03

Game Boy Color

Super Mario Bros. DeluxeMore Album Unlockables11/17/03

Nintendo 64

Doom 64Features Menu (the alternate way)01/15/04
Doom 64Play Hectic Demo01/13/04
Mario PartyUnlock more songs in Jukebox01/04/05
Mario Party 2Buy Mini Games10/01/03
Mario Party 2Unlock Credits Machine12/20/04
Mario Party 2Win Coins when using a Mushroom01/21/05

PC

Command & Conquer: Tiberian SunFree Building Repairs03/19/05
Final DoomAll weapons, full ammo, 200% armor with no keys:07/21/03
Final DoomFull Map, but with object indicators09/14/03
Master Levels for Doom IICodes07/25/05
Sonic & Knuckles CollectionBlue Sphere Passwords.03/20/06
The Ultimate DoomAll weapons, full ammo, 200% armor WITHOUT keys:07/20/03
The Ultimate DoomFull automap with object Indicators09/15/03

PlayStation 2

Sonic Mega Collection PlusBlue Sphere Passwords.01/07/05

Super Nintendo

Super Mario All-Stars / Super Mario WorldNew World Map Colors (Super Mario World)12/15/04
Super Mario All-Stars / Super Mario WorldOriginal SMB music (Super Mario World)12/15/04
Super Mario All-Stars / Super Mario WorldRe-enter finished Castles and Fortresses (Super Mario World)12/15/04
Super Mario All-Stars / Super Mario WorldWorld 9 (the Lost Levels)12/15/04
Super Mario World 2: Yoshi's IslandUnlock secret levels and bonus games in each world01/24/05