Games like Red Chair
Games like Red Chair include Phasmophobia, Unheard - Voices of Crime, Escape Simulator, Liars Bar, and Cyber Manhunt. We matched them by the tags players give Red Chair on Steam (Detective, Investigation, Puzzle, Mystery, and Crime): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Co-op · Multiplayer · Online Co-Op

Unheard - Voices of Crime
Shared: Detective · Mystery · Puzzle

Escape Simulator
Shared: Co-op · Puzzle · Multiplayer

Liars Bar
Shared: Co-op · Multiplayer · Online Co-Op

Cyber Manhunt
Shared: Puzzle · Detective · Mystery

Sherlock Holmes: Crimes and Punishments
Shared: Detective · Investigation · Mystery

We Were Here Forever
Shared: Puzzle · Co-op · Online Co-Op

Sherlock Holmes: The Devil's Daughter
Shared: Detective · Puzzle · Mystery

Murders on the Yangtze River
Shared: Detective · Puzzle · Mystery

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

The Operator
Shared: Detective · Investigation · Puzzle

It Takes Two
Shared: Co-op · Puzzle · Multiplayer

We Were Here
Shared: Co-op · Puzzle · Mystery

Tick Tock: A Tale for Two
Shared: Co-op · Puzzle · Online Co-Op

Human Fall Flat
Shared: Co-op · Puzzle · Multiplayer

Demonologist
Shared: Co-op · Multiplayer · Investigation

We Were Here Together
Shared: Puzzle · Co-op · Online Co-Op

Phoenix Wright: Ace Attorney Trilogy
Shared: Detective · Mystery · Story Rich

Escape Simulator 2
Shared: Puzzle · Co-op · Detective

Cyber Manhunt 2: New World - The Hacking Simulator
Shared: Detective · Puzzle · Investigation

L.A. Noire
Shared: Detective · Crime · Investigation

Schedule I
Shared: Co-op · Crime · Multiplayer

The Case of the Golden Idol
Shared: Detective · Investigation · Mystery

Who's Your Daddy?!
Shared: Multiplayer · Co-op · Funny