BigTree TopGun is a top-down shooter that employs the familiar "rotating turret" mechanic; enemy bugs enter the playing field from all angles, while each level the amount of enemy waves increases. The onslaught consists of a diverse array of evil little buggers that fly in erratic, difficult-to-hit patterns and possess innate abilities that make them immune to certain types of attack.

Drawing inspiration from popular "castle defense" games like BowMaster Prelude, Elona Shooter adds a serious helping of Asian-influenced, tactical RPG mechanics. You not only get to defend your castle from swarms of oncoming monsters with a satisfying array of weapons and skills, you won't have to go at it alone; an entire tactical RPG-styled party of helpers comes to your aid, eventually.