THE SCENE: Unmanned alien offence craft from an anti-universe are reeking havoc as they fly randomly through space on kamikaze missions. Consisting of anti-matter they cause spectacular explosions on contact with any matter from our own universe.
YOUR MISSION: To protect a convoy of vital spacecraft from the aliens by destroying as many as possible before they can render any damage.
YOUR WEAPONS: You only weapon is simple but effective. Rushing through space, gas clouds can be released in the alien's flight path causing explosive annihilation on contact.
How long can you protect your convoy?
How many enemy craft can you destroy?