Games to play on the Genesis for those looking to expand are as followed: Battletoads & Double Dragon, X-Men 2 Clone War, Cyborg Justice, all the Sonic games, all the Streets of Rage games, Comic Zone, the Road Rash trilogy, Aladdin, Phansy Star IV, Mortal Kombat 1 - 3 (get a six buttoned controller for that), Street Fighter II Champion Edition, and if you have a 32x addon, Doom.