Introduction (JUE switch, JPN cartridges (Golden Axe 3), Streets of Rage 2)
World cartridges (Sonic 1 & 2, Revenge of Shinobi, Lion King)
Region free (Psycho Pinball, Zero Wing, Pitfall)
Region locked but well-behaved (Rocket Knight Adventures, Mean Bean Machine, Sonic 3 & Knuckles)
Working but imperfect (Aladdin, Earthworm Jim 1 & 2, Eternal Champions)
Game Genie unlockable (Street Fighter II SCE, Maui Mallard, Shinobi III)
50 Hz optimized (Virtua Racing, Toejam & Earl in Panic on Funkotron)
Simply doesn't work (Comix Zone, Another World)