Games like Mango
Games like Mango include The Beginner's Guide, Superliminal, The Stanley Parable, Layers of Fear (2016), and Mouthwashing. We matched them by the tags players give Mango on Steam (Surreal, Indie, Psychedelic, Adventure, and First-Person): closest matches first, and among equally close ones the better-known games.

The Beginner's Guide
Shared: Indie · First-Person · Walking Simulator

Superliminal
Shared: Surreal · First-Person · Psychological

The Stanley Parable
Shared: Indie · First-Person · Psychological

Layers of Fear (2016)
Shared: Psychological Horror · First-Person · Indie

Mouthwashing
Shared: Psychological Horror · Indie · Surreal

Firewatch
Shared: Adventure · First-Person · Indie

Antichamber
Shared: Indie · Surreal · First-Person

What Remains of Edith Finch
Shared: First-Person · Adventure · Walking Simulator

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

The Exit 8
Shared: Psychological Horror · Surreal · Walking Simulator

Milk outside a bag of milk outside a bag of milk
Shared: Psychedelic · Psychological Horror · Indie

Before Your Eyes
Shared: Indie · First-Person · Adventure

Layers of Fear 2 (2019)
Shared: Indie · Psychological Horror · Adventure

Cruelty Squad
Shared: Surreal · Psychedelic · Psychological Horror

Viewfinder
Shared: Surreal · First-Person · Adventure

Moncage
Shared: Indie · Surreal · Adventure

Fran Bow
Shared: Psychological Horror · Indie · Adventure

KARMA: The Dark World
Shared: Psychological Horror · First-Person · Walking Simulator

Obduction
Shared: Adventure · Indie · Surreal

Plug & Play
Shared: Indie · Surreal · Adventure

Eclipsium
Shared: Surreal · Psychedelic · Psychological Horror

MiSide
Shared: Psychological Horror · First-Person · Story Rich

Manifold Garden
Shared: Surreal · First-Person · Psychedelic

Jazzpunk: Director's Cut
Shared: Indie · Surreal · Adventure