Games like Barbotine
Games like Barbotine include Mouthwashing, Hellblade: Senua's Sacrifice, The Beginner's Guide, Layers of Fear (2016), and NaissanceE. We matched them by the tags players give Barbotine on Steam (Psychological, Surreal, Atmospheric, 1990's, and Horror): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Atmospheric · Horror · Psychological

Hellblade: Senua's Sacrifice
Shared: Psychological · Atmospheric · Dark

The Beginner's Guide
Shared: Atmospheric · Surreal · Psychological

Layers of Fear (2016)
Shared: Atmospheric · Horror · Walking Simulator

NaissanceE
Shared: Atmospheric · Surreal · Abstract

INDIKA
Shared: Surreal · Horror · Psychological

Outlast
Shared: Horror · Atmospheric · Dark

Viewfinder
Shared: Surreal · Psychological · Abstract

Buckshot Roulette
Shared: Dark · Horror · Psychological

Amanda the Adventurer
Shared: Horror · 1990's · Atmospheric

Layers of Fear 2 (2019)
Shared: Atmospheric · Horror · Dark

[Chillas Art] The Convenience Store
Shared: Horror · Atmospheric · Psychological

SOMA
Shared: Atmospheric · Horror · Dark

Antichamber
Shared: Surreal · Abstract · Atmospheric

LIMBO
Shared: Atmospheric · Dark · Surreal

Firewatch
Shared: Atmospheric · Walking Simulator · Adventure

Little Nightmares
Shared: Atmospheric · Horror · Dark

Happy Game
Shared: Horror · Atmospheric · Dark

Bad Parenting 1: Mr. Red Face
Shared: Horror · 1990's · Dark

That Which Gave Chase
Shared: Atmospheric · Horror · Surreal

Visage
Shared: Horror · Dark · Atmospheric

Hypnagogia² 無限の夢 Boundless Dreams
Shared: Surreal · Atmospheric · Horror

Lost in Vivo
Shared: Atmospheric · Horror · Psychological

No, I'm not a Human
Shared: Horror · Atmospheric · Psychological