Aliens have invaded and you are the only one who can stop them!

Waves of alien ships will attack you from all directions and you must shoot them down as quickly as possible in order to survive! Many aliens can be destroyed with a single shot, but some will require multiple hits.

One alien craft, the 'Cargo Ship' takes several hits to destroy - but will release a weapon Power-Up if you can shoot it down in time. Collecting the Power-Ups will improve your choppers fire power up to 6 times.

During each level you will face several minor boss aliens. They will drop from above and circle around the screen firing bursts of deadly lasers at you. These will require many hits to destroy as they are heavily armoured and present a serious threat. When they explode they will release a shower of shrapnel which should be avoided at all costs! A hit from a piece of this shrapnel will cost you a life!

At the end of each level you will confront the guardian mother ship for that area. These are huge alien craft with the highest armour and fire power you will find. Each moves in a certain pattern and has a weak point enabling you to take it down.  Watch how it moves - learn the firing patterns and look for the weak points.