Sega Genesis Collection Cheats

To unlock Sega's arcade game Tac-Scan, make it to the bonus stage in the first level of Ristar.

To unlock this classic arcade shooter, go play sonic the hedgehog and collect one chaos emerald.

To collect a chaos emerald, you have to collect 50 rings during the course of a stage and then jump through the giant ring at the end. Once inside, you'll be able to collect the emerald and unlock this classic!

To unlock the sound test, beat the game. Then, at the title screen, press B (or whatever button you have mapped as B). A menu will pop up, and you can listen to all the music in the game.