Level 10: Planet X

Planet X: The Giant Brain is the tenth and final level in Otto Matic.

Level Overview
This is the final boss, and he's easier than you'd think. All you have to do is destroy the teleporters surrounding the boss, and then shoot the floating brain when it opens to fire at you. Then just collect the humans and go home! Because of the great amount of ammo neeed to defeat the great brain, all weapons are regenerated in this level.

Elite Brain Aliens
Elite Brain Aliens are a much more powerful version of their "ordinary" counterparts. The Elites' purpose is simply to guard the Great Brain and, of course, to hurt you. Unlike the normal Brain Aliens, the Elites wear orange jumpsuits with elongated collars, and are much fiercer and harder to kill. They enter Level 10 via teleporters. Once successfully teleported, they will avidly attempt to hurt and kill you. Their attacks are the same as the normal Brain Aliens', but the Elites will use them much more often. Elites also attack in numbers which will make them hard to destroy. Elite Brain Aliens will simply keep following you if you attempt to retreat, so, with flight out of the question, the only other option is to fight.

The Elites can be killed with any weapon. It is best to collect a considerable amount of ammunition when dealing with Elite Brain Aliens, as they require far more firepower to deal with than almost any other enemy. They are one of the enemies that can not be destroyed by jump-jetting.

Giant Brain
The Giant Brain will only attack when the teleporters are gone. Then it will split in half and shoot lightning at you. This is the only time it can be damaged, as Otto must shoot in between the two brain segments. Unlike the Pitcher Plant, the Giant Brain is vulnerable to multiple attacks.

Trivia

 * This is the only boss level that does not begin with full rocket fuel.
 * This is the only boss level that does not take place on a previous planet.