Games like Case Files: Internal Affairs
Games like Case Files: Internal Affairs include The Operator, Sherlock Holmes: The Devil's Daughter, Telling Lies, Sherlock Holmes: Crimes and Punishments, and L.A. Noire. We matched them by the tags players give Case Files: Internal Affairs on Steam (Mystery, Detective, Investigation, Adventure, and FMV): closest matches first, and among equally close ones the better-known games.

The Operator
Shared: Detective · Investigation · Mystery

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

Telling Lies
Shared: Mystery · Detective · FMV

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

L.A. Noire
Shared: Detective · Mystery · Adventure

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

Contradiction: Spot The Liar
Shared: Detective · Investigation · FMV

Duck Detective: The Secret Salami
Shared: Detective · Investigation · Casual

Her Story
Shared: Investigation · Detective · Interactive Fiction

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

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

Cyber Manhunt
Shared: Mystery · Detective · Simulation

Duck Detective: The Ghost of Glamping
Shared: Detective · Investigation · Adventure

Orwell: Keeping an Eye On You
Shared: Investigation · Detective · Simulation

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

Strange Horticulture
Shared: Mystery · Detective · Investigation

The Roottrees are Dead
Shared: Detective · Mystery · Investigation

The Painscreek Killings
Shared: Mystery · Investigation · Detective

Scene Investigators
Shared: Detective · Mystery · Investigation

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

Uncover the Smoking Gun
Shared: Investigation · Detective · Crime

Sherlock Holmes Chapter One
Shared: Detective · Mystery · Adventure

Back to the Dawn
Shared: Detective · Adventure · Investigation

The Mermaid Mask
Shared: Detective · Adventure · Mystery