Primarily consisted of Nintendo's lotcheck archive for Game Boy and Game Boy Color, including prototypes and unreleased alternate versions (revisions, localizations, translations, etc.) of various games plus a number of unreleased titles - some of which had never been publicly announced.
September 2020 Nintendo Leak
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- AMF Bowling
- Absolute X
- Austin Powers Episode III: Yeah, Baby, Yeah!
- Austin Powers Episode IV: Why Make Millions...
- Billiard Club
- Bobby's World (Game Boy)
- Bounced
- Carnivalé (Game Boy Color)
- Carrera
- Gimmick Land
- Grand Casino
- Hajimari no Mori (Game Boy Color)
- Hello Kitty Pocket Camera
- Jaguar Mishin Sashi Senyou Soft: Kirby Family
- Jibaku-kun: Zero no Ki no Kajitsu
- John Madden Football (Game Boy)
- Magi-Nation: Keeper's Quest
- Max Steel: Covert Missions (Game Boy Color)
- Mission Bravo
- Momoiro Zousan
- Nick Faldo Championship Golf
- Pokémon Picross (Game Boy Color)
- Rap Quest
- Runelords
- Sea-Doo Hydrocross (Game Boy Color)
- Space-Net: Cosmo Neo
- Sutte Hakkun (Game Boy)
- The Legend of Zelda: Four Swords Anniversary Edition/Debug Build
- VR Sports: Powerboat Racing (Game Boy Color)
- Wily & Right no Rock Board (Game Boy)
- Workboy
prototype57
- Proto:10-Pin Bowling
- Proto:3D Pocket Pool
- Proto:Alien Olympics 2044 AD (Game Boy)
- Proto:Asterix (Game Boy)/US Version
- Proto:Card Game
- Proto:Carmageddon (Game Boy Color)
- Proto:Casper (Game Boy Color)
- Proto:Castelian (Game Boy)
- Proto:Catrap
- Proto:Catwoman (Game Boy Color)
- Proto:Donkey Kong Country (Game Boy Color)
- Proto:Donkey Kong Land III/Japanese
- Proto:F-18 Thunder Strike
- Proto:Flipnote Studio
- Proto:Game Boy Wars 3
- Proto:Golf Daisuki!
- Proto:Golf Ou: The King of Golf
- Proto:Gomoku Narabe Renju
- Proto:Klustar/Japanese version
- Proto:Koukou Nyuushi Derujun - Chuugaku Eijukugo 350
- Proto:Koukou Nyuushi Derujun - Chuugaku Eitango 1700
- Proto:Lemmings & Oh No! More Lemmings
- Proto:Magnetic Soccer
- Proto:Nintendo DSi System Settings/SDK 5199
- Proto:Nintendo DSi/Pre-compiled Unnamed SDK Menu
- Proto:Out of Gas
- Proto:Paper Airplane Chase
- Proto:Pokémon Mystery Dungeon: Explorers of Time & Darkness/paladin.7z Leaks
- Proto:Pokémon Mystery Dungeon: Explorers of Time & Darkness/paladin.7z Leaks/Debug ROMs
- Proto:Pokémon Mystery Dungeon: Explorers of Time & Darkness/paladin.7z Leaks/Prototype Differences
- Proto:Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team/ab9je00.srl
- Proto:Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team/na57e00.srl
- Proto:Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team/na57j00.srl
- Proto:Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team/naphj10 debug.srl
- Proto:Popeye (Game Boy)
- Proto:Prince of Persia (Game Boy Color)
- Proto:Puzznic (Game Boy)
- Proto:Sewing Machine Operation Software
- Proto:Shin Megami Tensei: Devil Children: Shiro no Sho
- Proto:Speedball 2: Brutal Deluxe (Game Boy)
- Proto:Speedy Gonzales: Aztec Adventure
- Proto:Spy vs. Spy (Game Boy Color)
- Proto:Super Game Boy
- Proto:TaleSpin (Game Boy)
- Proto:The Lawnmower Man (Game Boy)/November 10, 1993
- Proto:The Little Mermaid (Game Boy)
- Proto:The Little Mermaid II: Pinball Frenzy
- Proto:The New Addams Family Series
- Proto:The Powerpuff Girls: Bad Mojo Jojo
- Proto:Tiny Toon Adventures: Dizzy's Candy Quest
- Proto:Trajectile
- Proto:We're Back! A Dinosaur's Story (Game Boy)
- Proto:X-Scape
- Proto:X/Lunar Chase
- Proto:Yu-Gi-Oh! Dark Duel Stories/CGBBY3F0
- Proto:Yu-Gi-Oh! Dark Duel Stories/CGBBY3P0
- Proto:Zool (Game Boy)