Successfully complete all levels and save your friends to unlock the Uranoid mini-game at the main menu. In the Japanese version of the game, press R, Left, Right, L, Right, R at the title screen to unlock the Uranoid mini-game. If you entered the code correctly, you will hear a sound.
Geometric backgrounds, metal frame, and Twin BlockSuccessfully complete Clear Game, Uranoid, and Quest Game modes to unlock seven geometric backgrounds, a metal frame, and Twin Block.
Original Vaus shipSuccessfully complete all Quest mode levels to unlock the Original Vaus ship.
Play as ArtemisSuccessfully complete Zone V' in Quest mode to unlock Artemis.
Play as NeithSuccessfully complete Zone Z' in Quest mode to unlock Neith.
Play as OperonSuccessfully complete Zone W in Quest mode to unlock Operon.
Play as RheaSuccessfully complete Zone V in Quest mode to unlock Rhea.
Captain Neo background musicSuccessfully complete Theta-5 in Uranoid with a score of at least 400,000 points to unlock the Captain Neo background music.
Happy Smiling background musicSuccessfully complete Eta-5 in Uranoid with a score of at least 400,000 points to unlock the Happy Smiling background music.
Revenge Of Arkanoid background musicSuccessfully complete Lota in Uranoid with a score of at least 400,000 points to unlock the Revenge Of Arkanoid background music.