The aliens have invaded the subterranean world! All Rangers are called to battle to restore peace. Choose your hero, your weapon and your favorite mecha to destroy them all! Guns of Mercy is a pixel art shooting and arcade game in which you have to go through hundreds of levels. Get rid of the 8 bosses in the game. Unlock and upgrade new heroes, weapons or meches to increase your destructive power. Play solo or with up to three friends! Who will be the best?