The essence of the game is that you will need for the least amount of time to destroy as many demons, which will be located on the city's streets. If you can handle the task set before you, and you can destroy all the demons, you are automatically taken to the next level in the game provided. If you are not able to achieve its goal in front of you and you can not destroy the necessary number of demons, you lose. Control of the game by using a computer mouse. It will help you manage the rifle in the game.