Also known as vaporware - these are a list of games that were announced while still in development, but were cancelled or moved to another system.
Famicom
- Arc Hound (available on the NES as Contra Force)
- Deep Dungeon (available only on the Disk System)
- Monster Party (released on the NES by Bandai)
- Ninja Cop Saizou 2
- Rune Master
- Seiken Densetsu: The Emergence of Excalibur (Moved to the SNES)
- Spirit Animal Genesis
NES
- 10th Frame (Available for PC)
- A Boy and His Blob 2
- The Addams Family 2 (Available on Game Boy and SNES)
- American Crisis
- Arcadia VI
- Backgammon
- Bee 52 (Aladdin)
- Big Nose: The Witch Doctor
- Bio Force Ape
- Black Tiger
- Blaster Master 2 (Available on Genesis)
- California Raisins: The Grape Escape
- Card Sharks
- Caveman Ninja (Released as Joe and Mac)
- Creation
- Deja Vu II: Lost in Las Vegas (Later released on Game Boy Color)
- Dr. Franken (Unreleased Prototype, available for Game Boy)
- Drac's Night Out (Not commercially released)
- Final Fantasy IV (Moved to the SNES)
- Genjuu Souseki
- Happy Camper
- Hard Drivin'
- Hoppin Mad
- Hit the Ice (Not commercially released)
- Inspector Gadget (Available on SNES)
- John Madden Football
- Kitty's Catch
- The Legend of Zelda: The Triforce of Saga (Later turned into The Legend of Zelda: A Link to the Past for the SNES)
- Licence to Kill
- Married... With Children
- Mii (Concept moved to Wii)
- Monster Party II
- New Kids on the Block
- Off Zarken
- The Price is Right
- Return of Donkey Kong
- RoboCop versus The Terminator (Available for SNES and Game Boy)
- Secret Ties (Not commercially released)
- Solomon's Key 2 (Released as Fire & Ice)
- Space Ace
- Sim City (Moved to the SNES)
- Spy vs Spy: The Island Caper
- Street Fighter 2
- Sunman (Not commercially released)
- Super Password
- Talking Super Password
- Time Diver: Eon Man (Not commercially released)
- Titan Warriors (Not commercially released)
- USA Bowling
SNES
- Final Fantasy VII (Moved to the PlayStation)
- FX Fighter - (Available for PC)
- GoldenEye 007 (Moved to the N64)
- Kid Icarus SNES
- Mortal Kombat: Arena Edition
- The Shadow
- Socks the Cat Rocks the Hill
- Sound Fantasy
- Star Fox 2
- Steven Segal: The Final Option (Redesigned as Deadly Honor for Nintendo 64 and PlayStation)
- Super Mario FX
N64
- 1080 Snowboarding 2 - (Moved to the GCN under the name of 1080 Avalanche)
- 40 Winks - (N64 version cancelled, available for PlayStation [With a Nintendo Power quote on it])
- 64 Wars
- BassMasters 2000 - (Appeared at E3 1999, but cancelled)
- Beetle Adventure Racing 2
- Buggie Boogie
- Cabbage
- Catroots
- Climber
- Dinosaur Planet - (Moved to GCN under the name of StarFox Adventures)
- Disney's Dinosaur - (Available on PlayStation)
- Doubutsu Banchou - (Moved to the GCN under the name of Cubivore: Survival of the Fittest)
- Earthbound 64 - (Cancelled, then revived and released for the GBA as Mother 3)
- Echo Delta
- Eternal Darkness: Sanity's Requiem - (Moved to the GCN)
- F1 '98
- Final Fantasy VII - (Moved to the PlayStation)
- Fire Emblem 64 - (Moved to the GCN)
- First Samurai 64
- Freak Boy
- Glover 2
- Harrier 2001
- Hello Kitty 64
- HeroQuest 64
- Jack and the Beanstalk
- Japan Pro Golfer 64
- Joust 64
- Jungle Emperor Leo
- Kameo: Elements of Power - (Moved to the Xbox 360)
- Kirby Air Ride - (Moved to the GCN)
- Looney Tunes: Space Race
- Luigi's Mansion - (Moved to the GCN)
- Mario Artist: Sound Maker
- Mega Man 64 2 - (Available as Mega Man Legends 2 for PlayStation)
- Metroid 64
- Mini Racers
- NBA Showtime 2000
- NHL Blades of Steel 2000
- Nightmare Creatures II
- O.D.T. - (Available for PlayStation & PC)
- Pilotwings 64 2
- Pitfall
- Pokémon Colosseum - (Moved to the GCN)
- Pokémon de Panepon 64 - (Japanese Release of Pokémon Puzzle League, available in USA and Europe)
- Powerslide
- Project Cairo
- Quest 2
- Quest for Camelot 64
- Red Baron
- Renegade Racers
- Resident Evil 0 - (Moved to the GCN)
- Robotech: Crystal Dreams - (Moved to the GCN)
- Sea-Doo HydroCross - (Available for PlayStation)
- Shadowgate Rising
- SimCopter 64
- Smurfs 64
- Super Mario 64 2 - (Moved to the GCN under the name of Super Mario Sunshine)
- Sydney 2000 - (Available for PlayStation and Dreamcast)
- Teo
- Ura Zelda - (Tweaked and moved to GCN under the name "Zelda: Ocarina of Time Master Quest")
GameCube
- Alias - (Available on PC)
- Area 51 - (Available for PlayStation 2 & Xbox)
- Army Men: Air Cavalry
- Banjo-Threeie (Cancelled due to Rare and Nintendo breaking up)
- Barbie Horse Adventures: Wild Horse Rescue - (Available on PlayStation 2 & Xbox)
- Cabela's Dangerous Hunts - (Available for PlayStation 2, Xbox, and PSP)
- Crash Twinsanity - (Cancelled due to poor sales of the PlayStation 2 & Xbox versions.)
- The Crocodile Hunter
- Crouching Tiger, Hidden Dragon - (Available for PlayStation 2 & Xbox)
- Damage Inc.
- Dead Phoenix
- DK Bongo Blast - (Moved to Wii as Donkey Kong Barrel Blast)
- Donkey Kong Racing
- Dr. Seuss The Cat in the Hat - (Available for PlayStation 2 & Xbox)
- Driv3r - (Available for PlayStation 2 & Xbox)
- Family Guy: The Video Game - (Available for PlayStation 2 & Xbox)
- Fight For Your Right
- Futurama - (Available for PlayStation 2 & Xbox)
- Grabbed by the Ghoulies - (Moved to the Xbox)
- Gravity Games Bike - (GameCube version cancelled, available for PlayStation 2 & Xbox)
- Jonny Moseley's Mad Trix 2
- Joust
- Juiced - (Available on PlayStation 2 & Xbox)
- Kameo: Elements of Power - (Moved to the Xbox 360)
- Kirby GCN - (Moved to the Wii and later cancelled. May have resurfaced as Kirby's Return to Dream Land)
- Kirby Tilt 'N' Tumble GCN
- Mace Griffin: Bounty Hunter - (Available for PlayStation 2 & Xbox)
- Mario 128 - (Original concept for Pikmin)
- Marionette
- Meowth's Party - (GC Tech Demo, unlockable video in Pokémon Channel)
- NARC - (Available for PlayStation 2 & Xbox)
- NASCAR Thunder 2004 - (Available for PlayStation 2 and Xbox)
- NFL Retro Football
- Nintendo Pennant Chase Baseball
- Perfect Dark Zero - (Moved to the Xbox 360)
- Pilotwings - (Moved to Wii)
- Psi-Ops: The Mindgate Conspiracy - (Available for PlayStation 2 & Xbox)
- Rally Fusion: Race of Champions - (Available for PlayStation 2 & Xbox)
- Raven Blade
- Richard Burns Rally - (Available for PC, PlayStation 2 & Xbox)
- RTX Red Rock - (Available for PlayStation 2)
- Showdown: Legends of Wrestling - (Available for Xbox)
- Spy Hunter 2 - (Available for PlayStation 2 & Xbox)
- Stage Debut
- StarCraft: Ghost
- The Suffering - (Available for PlayStation 2 & Xbox)
- Thunder Rally
- Tom Clancy's Ghost Recon: Advanced Warfighter - (Available for PlayStation 2, Xbox and Xbox 360)
- Tom Clancy's Rainbow Six: Rogue Spear
- Too Human - (Moved to the Xbox 360)
- Super Monkey Ball 3 - (Transferred to Wii)
- Super Paper Mario - (Moved to the Wii)
- Yoshi platformer (Moved to Nintendo DS as Yoshi Touch & Go)
Wii
- Dance Factory (Available for PlayStation 2)
- Jon & Kate Plus 8 - (Available on Nintendo DS)
- Project H.A.M.M.E.R.
- Sadness
- Sonic The Hedgehog (Port of Xbox 360 version cancelled in favor of Sonic & The Secret Rings)
- Stuntman: Demolition
- Pikmin 3 (Moving to Wii U)
Game Boy/Color
- Denetsu no Starfy (Moved to GBA)
- Game Boy Music
- Kirby's Dream Land 2 DX
- The Legend of Zelda: Mystical Seed of Courage
- Mega Man V (Game Boy Color enhanced version)
- Metroid II: Return of Samus DX
- Rhino Rumble Puzzle
Game Boy Advance
- A Boy And His Blob
- Aero the Acro-Bat 2
- Battland
- Diddy Kong Pilot - (Remade and released as Banjo-Pilot)
- Donkey Kong Coconut Crackers - (Remade and released as It's Mr. Pants!)
- Donkey Kong Plus
- Game & Watch Gallery 4 (only Japan, which would have been known as Game Boy Gallery 4)
- Luna Blaze
- Mega Man Anniversary Collection
- Mega Man Mania
- Pocket Music
Nintendo DS
- A Boy And His Blob DS (while the NES franchise didn't make a return on the DS as initially planned, it was later revived on the Wii)
- Advance Wars: Days of Ruin (Japan only)
- America's Next Top Model - (U.S. Exclusive Release, Available in UK)
- Baten Kaitos DS
- Black & White Creatures
- Halo DS
- Jam With the Band
- Jet Impulse (outside Japan)
- Katamari Damacy
- Lizzie McGuire & That's So Raven
- Mobile Suit Gundam Seed
- Super Pac-Man Pinball
- Tokyo Xtreme Racer DRIFT
- Wander Donkey
Nintendo 3DS
- Assassin's Creed: Lost Legacy
- Mega Man Legends 3
Arcade
- Star Fox Arcade (May have been Star Fox Assault)