Figured we should have one since there is one for best games. Just keep it civil.
Daikatana
Bubsy 3D
Rift (post Storm Legion)
World of Warcraft: Warlords of Draenor
Big Rigs Over the Road Racing but this is so bad it's a good kind of bad
Superman 64
Atari 2600 version of Pac-Man
Zelda CDi trilogy
Sonic 06
Super Mario Bros 2
Castlevania 2
Any Sonic Boom game
Tony Hawks Pro Skater 5
And there are more but these are some I would call the worst.