Games like Raisond'etre
Games like Raisond'etre include Firewatch, Hollow Knight, Tiny Bunny, Outer Wilds, and Hollow Knight: Silksong. We matched them by the tags players give Raisond'etre on Steam (Adventure, Visual Novel, Exploration, Top-Down, and Gothic): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Story Rich · Exploration

Hollow Knight
Shared: Exploration · Adventure · Singleplayer

Tiny Bunny
Shared: Visual Novel · Story Rich · Singleplayer

Outer Wilds
Shared: Exploration · Adventure · Story Rich

Hollow Knight: Silksong
Shared: Exploration · Indie · Adventure

Raging Loop
Shared: Visual Novel · Adventure · Story Rich

Five Nights at Freddy's: Security Breach
Shared: Singleplayer · Exploration · Adventure

Urban Myth Dissolution Center
Shared: Visual Novel · Adventure · Exploration

OneShot
Shared: Story Rich · Adventure · Indie

What Remains of Edith Finch
Shared: Story Rich · Adventure · Exploration

God of War
Shared: Adventure · Story Rich · Singleplayer

Five Nights at Freddy's: Into the Pit
Shared: Adventure · Exploration · Singleplayer

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Visual Novel · Story Rich · Adventure

Tales of the Black Forest
Shared: Adventure · Visual Novel · Story Rich

Night in the Woods
Shared: Adventure · Story Rich · Exploration

The Coma 2: Vicious Sisters
Shared: Adventure · Singleplayer · Indie

Danganronpa: Trigger Happy Havoc
Shared: Visual Novel · Story Rich · Adventure

Tomb Raider Game of the Year
Shared: Adventure · Story Rich · Singleplayer

The Wolf Among Us
Shared: Adventure · Story Rich · Visual Novel

Fallout 4
Shared: Exploration · Adventure · Singleplayer

Reventure
Shared: Adventure · Indie · Exploration

OMORI
Shared: Story Rich · Indie · Adventure

Twelve Minutes
Shared: Adventure · Story Rich · Indie

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Visual Novel · Adventure · Story Rich