This is essentially a two-player game although the computer can
play against you and give you a mean run for your money.
Both players have mobile missile launchers stationed within two
vertical lines. Between these two bases anti-matter bombs appear
out of the blackness of centre screen and drift at random. They are
the target objectives. At first translucent, they take on colour
as missile shots are absorbed within. The concussion of impact will
cause the device to veer in a different direction.
Normally, the bombs rebound off each other and missile silos - but
when enough missiles hit on-target a critical stage will have been
reached. After several colour variations, the bomb will flare
intermittently.
Should it then touch a silo boundary it will explode, creating a breach
in your defences. If with successive attacks the gap is large
enough for a device to detonate against the adjacent wall, all is over.
So the idea of the game is to use missile impact and split-second
timing to drive anti-matter bombs through your opponent's outer
boundary to the inner.