Games like DETECTIVE - Rainy night
Games like DETECTIVE - Rainy night include Poppy Playtime, Outer Wilds, SOMA, Subliminal, and Lethal Company. We matched them by the tags players give DETECTIVE - Rainy night on Steam (Psychological Horror, Mystery, Realistic, Detective, and Horror): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Singleplayer · Psychological Horror

Outer Wilds
Shared: Mystery · Exploration · Singleplayer

SOMA
Shared: Psychological Horror · Horror · Sci-fi

Subliminal
Shared: Psychological Horror · Realistic · Mystery

Lethal Company
Shared: Horror · Psychological Horror · First-Person

The Complex: Expedition
Shared: Realistic · Psychological Horror · Horror

Ready or Not
Shared: Realistic · Singleplayer · Psychological Horror

What Remains of Edith Finch
Shared: Mystery · Singleplayer · Psychological Horror

Firewatch
Shared: Mystery · Singleplayer · Atmospheric

Firework
Shared: Horror · Mystery · Psychological Horror

Danganronpa: Trigger Happy Havoc
Shared: Mystery · Detective · Psychological Horror

Layers of Fear (2016)
Shared: Psychological Horror · Horror · Singleplayer

Sally Face - Episode One
Shared: Psychological Horror · Horror · Mystery

The Room Two
Shared: Mystery · Horror · Psychological Horror

Return of the Obra Dinn
Shared: Mystery · Detective · Singleplayer

Cube Escape Collection
Shared: Mystery · Psychological Horror · Horror

Phasmophobia
Shared: Psychological Horror · Horror · Detective

Outlast
Shared: Psychological Horror · Horror · Singleplayer

Backrooms: Escape Together
Shared: Psychological Horror · Horror · Realistic

ROUTINE
Shared: Psychological Horror · Singleplayer · Sci-fi

The Vanishing of Ethan Carter
Shared: Mystery · Detective · Horror

MiSide
Shared: Psychological Horror · Horror · Singleplayer

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

Prey
Shared: Sci-fi · Horror · Singleplayer