After burrowing to create her own hive, Mabel has grown into an Empress, with a xenomorph army under her command. Now, she has one goal, and one goal only...finding the creators of the xenomorph species.

After destroying Gravity Falls and all the Xenomorphs, Dipper had left Gravity falls to become the Yautja clan leader known as Star. Now, he must return to save his family and friends from an enemy even worse than the Xenomorphs...The Black Super Predators.

Note: This is NOT canon with the alien or predator series. Any information here regarding the aliens or predators may be false. If your an alien or predator fan, you'll know the difference. Anyway, the Xenomorph scourge has made its way to Gravity Falls. The Pines' only hope is to locate the predator weapons left by the writer of the journals.