This is an invader-type game for one player in which the object is to destroy all of the descending aliens (isn't it always?). The game starts with one alien attempting to 'land' on the surface of the planet. If this is killed then you move onto the next sheet with two aliens. This goes on until you have beaten off the sheet with six of the creatures, whereupon the game restarts with just one alien but becomes faster...and faster...and faster...!

You have three lives to play with and you lose one every time an alien lands. After losing all of your lives your score is displayed and the highest score is shown.

You control the cross on the screen, and have to move this directly on top of the alien and then fire.

Z - Left, X - Right, : - Up, / - Down, SPACE - Fire