Space War is a 2D shooting game. The aim of the game is to defeat the ultimate enemy spaceship and stop the alien invasion on earth. The player has to face different enemy waves, survive each wave by defeating the enemy spaceships before reaching the ultimate enemy.
Each wave has different types of enemies and the difficulty increases as the player advances. In the final wave the player has to fight with the ultimate enemy, dodge his bullets and defeat the space ship to stop the alien invasion and save the planet earth.