Gamma has kidnapped the hero's love and is holding her hostage at his Evil Temple hideout. The hero must defeat Gamma's forces to rescue his love.
Devilish is a Breakout variant. Instead of the screen remaining stationary, the game screen will scroll forward once the ball passes through a barrier. The game consists of eight stages. Players control a paddle and have to hit a power orb at barriers to break through them. The paddle can be configured into four different formations: an offensive position, a defensive position, an L formation, and a reverse L formation. Stages must be completed before time expires. Stages also contain treasure chests with bonuses such as extra time, a 1-Up, a Buster Ball that can break through any barrier, or a Flash Bomb that will destroy surrounding blocks when it explodes.
The game offers two modes: regular play and time trial. Time trial only includes the first six stages. Options allow players to choose between easy, normal, or hard difficulty levels and select the number of power orbs available at the start.