AstroChase for the Atari 5200. Gameplay takes place on a 2D scrolling map of space around Earth, which the player has to defend from an alien force. The primary target are a number of Mega-Mines, which approach the Earth and must be destroyed. The game is level-based (there are 36), and after all the Mega-Mines are destroyed the game progresses to the next level where players encounter a growing variety of enemy attack ships, with different speeds and offensive capabilities. An animated 'cut-scene' is played between each 4th level.