Sega Genesis Collection (PSP)
This game is titled Sega Genesis Collection in North America and Sega Megadrive Collection in Europe and Australia.
Highlight a game at the selection menu, then press R(2) to display a hint menu for that game.
Astro Blaster: Arcade version
Complete Episode 1 of Comix Zone.
Eliminator: Arcade version
Complete level 2 in Altered Beast.
Space Fury: Arcade version
Locate the first bonus area in Ristar.
Super Zaxxon: Arcade version
Play all games, including the other bonus arcade games.
Tip Top: Arcade version
Get a Chaos Emerald in Sonic The Hedgehog.
Unlock and watch all of the interviews in the "Extras" menu. The Cheat Sheet has cheat codes for almost all of the games.