Just like my "Top 10 Game of All-Time" post, this list is subject to change.
-Atari 2600 - Missile Command
-Nintendo NES - Crystalis
-SNES - Super Metroid
-N64 - Spider-Man
-GameCube - Metroid: Prime
-Wii - New Super Mario Bros. Wii
-Sega Master System - Cloud Master
-Genesis - Sonic the Hedgehog 3 + Sonic & Knuckles (no, I'm not choosing 2 games here, I'm talking how the game is played as a 1 whole game when the two games are locked together.)
-Saturn - Shinobi: Legions
-Dreamcast - Resident Evil: Code Veronica
-PlayStation - Resident Evil 2
-PS2 - King's Field: The Ancient City
-XBox - The Elder Scrolls III: Morrowind - Game of the Year Edition
-XBox 360 - The Elder Scrolls IV: Oblivion - Game of the Year Edition
-Game Boy - Super Mario Land 2: The 6 Golden Coins
-GBC - The Legend of Zelda: Link's Awakening DX
-GBA - Metroid: Zero Mission
-DS - New Super Mario Bros.
-3DS - The Legend of Zelda: Link Between Worlds
-Milton-Bradley Microvision - Block Buster (it's the only game I own on it, technically the handheld no longer works, but I still have the original packaging so I keep it around as a conversation piece since it's the world's first handheld console with interchangeable games.)
-Sega Game Gear - Sonic the Hedgehog in Triple Trouble
Windows/DOS PC - Neverwinter Nights: Diamond Edition
Used to own (but broke over the years):-Commodore 64 - Swiss Family Robinson
-Sega CD - Sonic CD
-TurboGrafx-16 - Bloody Wolf (technically it's Lords of Thunder on Turbo-CD, but I own that on Wii Virtual Console, so I didn't think that counted; SUCH a rocking soundtrack!)
-Neo Geo Pocket Color - Sonic Pocket Adventure