Debrysis is a futuristic arena shooter reminiscent of Robotron: 2084 and Mutant Storm. With five available arenas, players control a small car through a top-down view. The car can be moved around and can shoot opponent, who mostly have snake-like shapes. The goal is simply to score as much points as possible as the waves of enemies become progressively difficult until all lives are gone.
While playing, different kinds of weapons spawn, such as a shotgun, minigun, plasmagun, rocket launcher, flamethrower, plasma rifle and more. They are all handled different and some work better against certain enemies than others. Other power-ups are medikits, a meteor that hits the battleground, double score, upgraded weapons and devastation that launches rockets all over the screen. The keyboard is used to move around while aiming is done through the mouse. The game supports online leaderboards.