Games like SCP - The Sentient Box
Games like SCP - The Sentient Box include Murders on the Yangtze River, Unheard - Voices of Crime, The Painscreek Killings, Strange Horticulture, and Blue Prince. We matched them by the tags players give SCP - The Sentient Box on Steam (Exploration, Puzzle, Crime, Detective, and Investigation): closest matches first, and among equally close ones the better-known games.

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

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

The Painscreek Killings
Shared: Exploration · Investigation · Detective

Strange Horticulture
Shared: Puzzle · Detective · Investigation

Blue Prince
Shared: Puzzle · Exploration · Investigation

Outer Wilds
Shared: Exploration · Puzzle · Story Rich

Tangle Tower
Shared: Puzzle · Exploration · Detective

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

The Rise of the Golden Idol
Shared: Detective · Puzzle · Investigation

The Operator
Shared: Detective · Puzzle · Investigation

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

Sherlock Holmes: Crimes and Punishments
Shared: Detective · Crime · Puzzle

Her Story
Shared: Investigation · Detective · Puzzle

Cyber Manhunt
Shared: Puzzle · Detective · Crime

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

Strange Antiquities
Shared: Puzzle · Detective · Exploration

ANIMAL WELL
Shared: Exploration · Puzzle · 2D

The Exit 8
Shared: Exploration · Puzzle · Horror

Blacksad: Under the Skin
Shared: Exploration · Puzzle · Detective

The House of Da Vinci
Shared: Puzzle · Exploration · 3D

The Silent Age
Shared: Puzzle · Detective · Alternate History

Detective Grimoire
Shared: Exploration · Puzzle · Detective

Return of the Obra Dinn
Shared: Puzzle · Detective · Story Rich

Firework
Shared: Puzzle · 2D · Horror