If both players survive the assault, they proceed to the next wave. If one player loses all reserve bunkers and gets vaporized, the other continues defying the demons. Games 5 and 7 feature special tracer shots. Co-op Games Games 8 and 9 allow two players to take turns against the same wave of attack. Control of the Laser Cannon alternates between you and your partner every four seconds.
Independant scores appear on the screen, keyed to cannon color.