New codes for old games

Approximately 20% of my mental capacity was dedicated to finding, using, and thinking about cheat codes when I was a kid. I first submitted a code to SegaSages.com when I was 11, and you can still find some cheats credited to me from those days (using my father’s e-mail address) in various places (e.g.).
A few decades later, I picked up the cheat code hunting hobby again. Here are the previously-undocumented cheat codes that I’ve found since I started working on the content on what would turn into this blog.
Sega Saturn
Here are articles I’ve written that describe new cheat codes:
Actua Golf: A few developer Eastern Eggs.
Alien Trilogy: The missing cheat passwords for Saturn.
Asuka 120% Limited BURNING Fest.: A fun controller trick that unlocks the bonus characters.
BattleSport: A batch of codes to unlock vehicles, opponents, arenas, and more.
Battle Monsters: Play as the boss characters, debug mode, see character endings, and more.
Clockwork Knight 2: One of my favorites — a code to unlock the whole first game.
Doom: A long-hidden X-ray vision cheat.
Dungeon Master Nexus: A previously unknown debug menu code.
Earthworm Jim 2: This missing codes for the regional variants of the Saturn game, plus some new ones.
Fighters Megamix: Unlock (most of) the hidden things in this game with button codes.
Fighting Vipers: An obscure “backup debugger” cheat code, among other things.
G Vector: A batch of cheats that are very difficult to pull off.
Gale Racer: The missing Flicky ornament.
Ghen War: The Internet knew a few codes for this game; I found the rest.
Gex: The missing codes for the Saturn version.
Grid Runner: Several new passwords that tweak gameplay.
Gunbird: The test menu, invincibility, stage skip, and frame advance.
Hang On GP: Unlock the “Special machine” and more.
Hardcore 4x4: Some fun Easter eggs from the game staff.
Highway 2000: Unlock unlimited time mode. Also a movie viewer option for the Japanese version, Wangan Dead Heat.
Iron Man / X-O Manowar in Heavy Metal: A hidden cheat screen, plus some developer Easter eggs.
Keio Flying Squadron 2: A debug mode code that enables several features.
The Lost World: Jurassic Park: Level select, invincibility, and two photo galleries.
Madden NFL 97: A hidden free camera mode.
Mobile Suit Gundam: There’s a long lost cheat menu, but you’ve gotta go fast to get to it.
NBA Action 98: A bonus team, plus some goofy player effects.
NHL 97: Some Easter eggs related to the developer, Visual Concepts.
Off-World Interceptor Extreme: A batch of codes for all three versions of this game.
Revolution X: The undiscovered cheat options screen.
The Sakura Wars games: Some difficult-to-enter debug menu codes.
Savaki: A debug cheat that enables a cool 3D model viewer, among other things.
Sengoku Blade: The hidden test menu and more.
Shiroki Majo: A fully-featured debug menu.
Skeleton Warriors: A surprising amount of math was needed to reveal this game’s missing cheat code.
Shockwave Assault: A hidden stage skip function.
Shinobi Legions: A totally bonkers debug mode code with 40 buttons.
Strikers 1945: The hidden test menu and more.
The Incredible Hulk — The Pantheon Saga: The cheat menu, long known to Action Replay hackers, can be accessed with a special code.
Three Dirty Dwarves: I broke the password encoding scheme and found one really useful code that wasn’t known before — “Superhero mode.”
Titan Wars / Solar Eclipse: I found a total of 60 cheat codes, most of which were previously undocumented.
Tokyo Highway Battle: Get $10 million (minus one), plus the secret Type-VW car.
Zen Nihon Pro Wres Featuring Virtua: Unlock “newspaper” mode.
I’ve reported on some code discoveries elsewhere — here are some cheat code discoveries without dedicated articles:
Sonic 3D — Flickies Island: The NTSC-J debug code.
Bug!: Level select for the NTSC-J version and debug features for the NTSC-U and PAL versions.
Criticom: I know that there is a code here, but I don’t know what it does...
Deep Fear: a rather lame debug info code.
Digital Pinball: Necronomicon: some not-very-exciting title screen codes.
Dragon’s Dream: Part of the research effort described here.
Eiyuu Shigan: Gal ACT Heroism: The debug code you were clamoring for.
Funky Head Boxers: make the heads funky in a different way, or something.
Independence Day: More special names for special features.
Jikkyou Oshaberi Parodius: Forever With Me: This one I don’t quite understand.
The Legend of Oasis: The button equivalent of the long-known Action Replay code.
Powerslave: use a special save name for cheat features.
Rayman: How to enter the difficult-to-enter codes.
Scorcher: Correcting the record on some often-misreported cheats.
Z: A password to view all of the movies, if you want that for some reason.
Zen Nihon Pro Wres Featuring Virtua: Unlock newspaper mode.
Sega Dreamcast
Cosmic Smash: Some Easter eggs that change your character’s uniform to have developer names.
Death Crimson 2, Death Crimson OX: Unlock extra mode and debugging features.
Ecco the Dolphin — Defender of the Future: Some special names that unlock stages, enable immortality, and more.
NCAA College Football 2K2: Some hidden cheats are carried over from NFL 2K.
NFL 2K1: More cheats carried over from NFL 2K.
NFL 2K2: More cheats carried over from NFL 2K here, too.
The Sakura Wars games: Debug cheats for the Dreamcast versions.
Segagaga: Activate one of the debug menus with controller number 3.
Super Runabout: The missing “unlock everything” code, plus some other previously undocumented Easter eggs.
Test Drive Le Mans: Special names to unlock new vehicles and show the credits.
Tokyo Xtreme Racer: An extra money cheat code. It also works in the PAL release, Tokyo Highway Battle.
Tony Hawk’s Pro Skater 2: Get a 10x multiplier for your tricks!
Woody Woodpecker Racing: Unlock everything in the not-quite-finished build.
Sony PlayStation
Alien Trilogy: The missing cheat passwords for PlayStation.
Galaga: Destination Earth: The cheat menu, previously only accessible with Action Replay.
Grid Runner: Several new passwords that tweak gameplay.
Madden NFL 97: A hidden free camera mode.
Off-World Interceptor Extreme: A batch of codes for all three versions of this game.
M&M’s Shell Shocked: Unlock all levels, access a cheat menu, and more.
MDK: I found the full set of codes for this port with the help of one of its developers!
Mobile Light Force: An invincibility cheat.
Shockwave Assault : A full enumeration of the available cheats.
Skeleton Warriors: A surprising amount of math was needed to reveal this game’s missing cheat code.
Test Drive Le Mans: An extra couple of special names.
The Incredible Hulk — The Pantheon Saga: The cheat menu, long known to Action Replay hackers, can be accessed with a special code.
Total Eclipse Turbo: The full set of cheat codes.
Tony Hawk’s Pro Skater 2: Two new codes for the PlayStation version.
Tony Hawk’s Pro Skater 3: Eight new codes for the PlayStation version.
Woody Woodpecker Racing: Unlock all characters and difficulty levels.
Wu-Tang: Shalon Style: Unlock everything.
Sony PlayStation 2
Test Drive Le Mans: Special names to unlock new vehicles.
Sony PlayStation Portable
Wipeout Pure & Wipeout Pulse: Unlock everything
Nintendo 64:
Tom & Jerry In “Fists of Furry”: Unlock everything
Nintendo GameCube
Darkened Skye: The “Cheats!” menu
3DO
BattleSport: A batch of codes to unlock vehicles, opponents, arenas, and more.
Off-World Interceptor Extreme: A batch of codes for all three versions of this game.
Phoenix 3: Some cheat codes and Easter eggs, plus commentary from the developer that put them in.
Shock Wave: A full enumeration of the available cheats.
Total Eclipse: The full set of cheat codes.