Games like Weird Water World
Games like Weird Water World include Outlast, Poppy Playtime, Bendy and the Ink Machine, Bendy and the Dark Revival, and Visage. We matched them by the tags players give Weird Water World on Steam (Fishing, Underwater, Psychedelic, Survival Horror, and Dark): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Survival Horror · Atmospheric · Dark

Poppy Playtime
Shared: Survival Horror · Dark · Singleplayer

Bendy and the Ink Machine
Shared: Survival Horror · Dark · Cartoony

Bendy and the Dark Revival
Shared: Survival Horror · Singleplayer · Dark

Visage
Shared: Survival Horror · Dark · Atmospheric

DAVE THE DIVER
Shared: Fishing · Underwater · Adventure

Outlast 2
Shared: Survival Horror · Dark · Atmospheric

Garten of Banban
Shared: Survival Horror · Singleplayer · Cartoony

Five Nights at Freddy's
Shared: Survival Horror · Singleplayer · Dark

Little Nightmares
Shared: Atmospheric · Dark · Adventure

Subnautica 2
Shared: Underwater · Survival Horror · Atmospheric

Choo-Choo Charles
Shared: Survival Horror · Dark · Singleplayer

Buckshot Roulette
Shared: Dark · Gambling · First-Person

SOMA
Shared: Atmospheric · Dark · Survival Horror

DREDGE
Shared: Fishing · Atmospheric · Adventure

Slender: The Arrival
Shared: Survival Horror · Dark · Atmospheric

ABZU
Shared: Underwater · Atmospheric · Adventure

How to Fish
Shared: Fishing · Adventure · Indie

Garten of Banban 2
Shared: Dark · Survival Horror · Cartoony

Iron Lung
Shared: Underwater · Atmospheric · Indie

Feed and Grow: Fish
Shared: Underwater · Simulation · Fishing

Amnesia: The Dark Descent
Shared: Survival Horror · Atmospheric · Dark

Layers of Fear (2016)
Shared: Atmospheric · Psychedelic · Singleplayer

Resident Evil Village
Shared: Survival Horror · Singleplayer · First-Person