Ozma Wars is a shoot 'em up game released by SNK in 1979. The game is one of the earliest examples of the genre, where the player must pilot a spaceship and shoot at incoming enemies and asteroids. The game has a unique feature, where the player's energy is constantly depleting, and can be replenished by shooting at fuel tanks. The game also has a scoring system, where the player can earn bonus points for shooting at certain enemies and targets.