A trial version program for Windows, by Idsoftware.

In the game, an interplanetary space marine is defending his home against a group of invading demons. The player can control the space marine in this game and will be able to assume the role of the space marine, fighting against waves of invading demons. The player will need to use different weapons, such as a machine gun, a grenade launcher, a rocket launcher, and an energy weapon, in order to survive.

The game consists of several levels, in which the player will need to fight against different waves of invading demons.