Space Raiders

CheatingDome.com

Alternate costumes

Press Start when choosing a character at the selection screen in story mode.

Bullets change to missiles

Hit an enemy 100 times in a row.

Screensaver

Remain idle at the title screen to view various FMV sequences of the game.

Space Invaders arcade game

Hold L1 + R1 and press X + Circle when "Press Start" appears at the opening screen.

Super primary weapon

Hit an enemy 50 times in a row.