Caterfighter

The Caterfighter is a large, green, helmet-wearing caterpillar with three sets of arms. Each set of arms has a different weapon. After receiving a certain amount of damage, one set of arms will disappear and the next set of arms will start firing. After going through three arm phases, the Caterfighter will be killed.

The first phase is that it will constantly shoot mortars, three at a time. The second set has a plasma gun that fires two plasma balls next to each other. The last set of arms has a flamethrower that has a very large range.