Weirdmageddon: Take Back the Falls

Game description:

Are you ready for Weirdmageddon? This end-of-the-world even has been predicted long ago. It was told the world will be swept by a wave of monsters. And now only two people can save it from certain perish - the main characters of Gravity Falls. In this game you'll have to set off on a dangerous and long journey that will take you through all kinds of lands. On your way, you have to fight multiple enemies and overcome a lot of trials. But hopefully, you'll manage to do it!