you are a pilot of space interceptor bound back to earth in order to give the captured alien spacecraft into the hands of scientists. the aliens are trying to stop you from doing this by sending a huge armada of their battleships. you have to destroy them all to accomplish your mission.

"back to earth 2" is a space arcade scrolling shooter, far superior to other games in this genre. the game is split into 7 episodes, each made of 4 levels. although there is no clear division between the levels, the final level of each episode ends with a battle with a new alien boss.