Battle invading aliens as they attack Earth - you alone stand between them and the destruction of the planet. Each second longer that you last takes you one step closer to the alien mothership and the key to the survival of mankind!
An evil alien race is bent on invading Earth. The hostile force includes multitudes of fast fighters, gun ships, a few surprises, and the huge mothership itself. Deep within the mothership lies your target - the key to the survival of the human race. The result of this battle spells certain death - and it's up to you to decide for whom - the aliens - or EARTH!