Paranormal Waters

Paranormal Waters is a SpongeBob SquarePants videogame crossover with Gravity Falls. It was released on August 17th, 2017.

Plot
''Dipper and Mabel accidentally discovered a portal to the underwater world and got into Bikini Bottom. There, Plankton teams up with Bill Cipher, ultimate super-villainic triangle. SpongeBob and gang is up to rule it out.''

SpongeBob timeline
AFTER the events of: Help Wanted, Tea at the Treedome, Plankton!, The SpongeBob Movie: Sponge Out Of Water

BEFORE the events of: The SpongeBob SquarePants Movie, The SpongeBob Movie: It's A Wonderful Sponge

Gravity Falls timeline
AFTER the events of: Every Gravity Falls episode

BEFORE the events of: Dipper and Mabel vs. The Future, Weirdmageddon Part 1, Weirdmageddon Part 2: Escape From Reality, Weirdmageddon 3: Take Back The Falls