The point of the game is to beat all the monsters in a screen without getting killed first. The action is turn based: you get to move all your players first and then all the monsters get to move after that. Monsters and players have various levels of hit points and damage dealing points, other players may join the party as you progess levels.

Your players can make one move per turn, and can either move to the adjacent square, or attack/fire a projectile in one of four directions.