Games like 愚人之夜
Games like 愚人之夜 include Lay a Beauty to Rest: The Darkness Peach Blossom Spring, Undertale, Raging Loop, Sanfu, and The Hungry Lamb: Traveling in the Late Ming Dynasty. We matched them by the tags players give 愚人之夜 on Steam (Mystery, Survival Horror, Story Rich, Multiple Endings, and Visual Novel): closest matches first, and among equally close ones the better-known games.

Lay a Beauty to Rest: The Darkness Peach Blossom Spring
Shared: Mystery · Visual Novel · Multiple Endings

Undertale
Shared: Story Rich · Multiple Endings · Singleplayer

Raging Loop
Shared: Mystery · Visual Novel · Story Rich

Sanfu
Shared: Mystery · Adventure · RPG

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

The Witcher 3: Wild Hunt — Remastered
Shared: Story Rich · RPG · Adventure

Firewatch
Shared: Story Rich · Mystery · Adventure

Phoenix Wright: Ace Attorney Trilogy
Shared: Mystery · Story Rich · Visual Novel

The Wolf Among Us
Shared: Story Rich · Adventure · Multiple Endings

The Test
Shared: Story Rich · Multiple Endings · Visual Novel

The Hex
Shared: Story Rich · Mystery · Indie

Five Nights at Freddy's: Security Breach
Shared: Survival Horror · Multiple Endings · Singleplayer

OneShot
Shared: Story Rich · Indie · Multiple Endings

OMORI
Shared: Story Rich · Indie · Multiple Endings

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

To the Moon
Shared: Story Rich · Indie · Adventure

Return of the Obra Dinn
Shared: Mystery · Story Rich · Indie

AI: The Somnium Files
Shared: Mystery · Visual Novel · Story Rich

Impostor Factory
Shared: Story Rich · Adventure · Mystery

Persona 4 Golden
Shared: Story Rich · Mystery · Singleplayer

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

Outer Wilds
Shared: Mystery · Story Rich · Adventure

Otaku's Adventure
Shared: Multiple Endings · Visual Novel · Indie

Zero Escape: The Nonary Games
Shared: Story Rich · Mystery · Visual Novel