I have a ton, I'll list what I can think of...
NES: Not going to bother listing...
SNES: Super Mario World 2: Yoshi's Island, Star Fox, All three Donkey Kong Country games, Super Metroid, and Secret of Evermore
N64: Banjo-Kazooie, Goldeneye, Perfect Dark, Jet Force Gemini, and Diddy Kong Racing
GB/C: Final Fantasy Adventure, Dragon Quest I-II, Dragon Quest III, Final Fantasy Legend III, and Donkey Kong '94
Genesis: Sonic the Hedgehog, Sonic 2, and Gunstar Heroes
PS1: Legend of the Dragoon, Mega Man Legends, [parasite eve], Tenchu, Metal Gear Solid, Final Fantasy VII, Final Fantasy IX, Grandia, Dragon Quest VII, and Crash 2
PS2: Kingdom Hearts, Suikoden III, Final Fantasy X, Final Fantasy XII, Metal Gear Solid 2, Metal Gear Solid 3, Dark Cloud, Dragon Quest VIII, Valkyrie Profile 2, Xenosaga: Episode I, and Xenosaga: Episode II
Dreamcast: Grandia II
Xbox: Halo, Halo 2, and Jet Set Radio: Future
Gamecube: Baiten Kaitos, The Legend of Zelda: Four Swords Adventures, The Legend of Zelda: Majora's Mask (Collector's Edition), Super Mario Sunshine, Star Fox Adventures, Metroid Prime, Metroid Prime 2, Pokemon Colosseum, Pokemon XD, and Luigi's Mansion
GBA: Final Fantasy Tactics Advance, Final Fantasy IV, Final Fantasy VI, Golden Sun, Golden Sun 2, Drill Dozer, Sigma Star Saga, Tales of Phantasia, Metroid Fusion, Castlevania: Aria of Sorrow, Castlevania: Harmony of Dissonence, Sonic Advance 2, Sonic Advance 3, Kirby and the Amazing Mirror, and Mario & Luigi: Superstar Saga
DS: Golden Sun 3, Fire Emblem: Shadow Dragon, Advance Wars: Days of Ruin, Mario & Luigi: Bowser's Inside Story, Retro Game Challenge, Space Invaders Extreme, Star Fox: Command, SMT: Strange Journey, Dragon Ball: Origins, Pokemon Ranger, Pokemon Ranger 2, Pokemon Mystery Dungeon: Blue, Pokemon Mystery Dungeon: Sky, Locke's Quest, Scribblenauts, Final Fantasy Tactics A2, Kingdom Hearts: 358/2 Days, Valkyrie Profile: Covenant of the Plume, Geometry Wars: Galaxies, and The Legend of Zelda: Spirit Tracks
PSP: Final Fantasy, Final Fantasy II, Final Fantasy Tactics, SMT: Persona, Yggdra Union, Castlevania: The Dracula X Chronicles, Valkyrie Profile: Lenneth, and Ratchet & Clank: Size Matters
Wii: No More Heroes 2, Super Mario Galaxy 2, Lego Star Wars: The Complete Saga, Muramasa, NPC: Pikmin, Metroid Prime 3, Super Mario RPG (VC), Secret of Mana (VC), and Final Fantasy (VC), Kirby's Adventure (VC)
360: Final Fantasy XIII, Red Dead Redemption, and Prince of Persia
PC (Ignoring Free/Indie Stuff): Star Wars: Dark Forces, SW: Jedi Knight, SW: Jedi Knight 2, SW: Jedi Knight - Jedi Outcast, SW: KotOR II, Psychonauts, StarCraft, and Fallout Tactics
3DS: Lego Star Wars III and Ocarina 3D
I have the following crappy excuses: I'm a huge collector/hoarder so I have a ton of games, many of the games I like are RPG's which are very long, I have some of my consoles at different places I technically live at but really don't, I have PLAYED many of these games but not to completion, and some of these are my brother's so I don't care to play them.