Games like Case Zero
Games like Case Zero include Unheard - Voices of Crime, Cookie Clicker, Getting Over It with Bennett Foddy, Murdered: Soul Suspect, and Fingered. We matched them by the tags players give Case Zero on Steam (Casual, Detective, Horror, Parody , and Crime): closest matches first, and among equally close ones the better-known games.

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

Cookie Clicker
Shared: Casual · Horror · Indie

Getting Over It with Bennett Foddy
Shared: Horror · Singleplayer · Casual

Murdered: Soul Suspect
Shared: Detective · Horror · Singleplayer

Fingered
Shared: Casual · Detective · Indie

Drug Dealer Simulator: Free Sample
Shared: Casual · Singleplayer · Crime

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

Poppy Playtime
Shared: Horror · Singleplayer · Indie

Five Nights at Freddy's
Shared: Horror · Singleplayer · Indie

Paper Bride
Shared: Horror · Detective · Casual

The Deed
Shared: Crime · Detective · Casual

Cyber Manhunt
Shared: Detective · Indie · Singleplayer

The Precinct
Shared: Detective · Crime · Singleplayer

Firework
Shared: Horror · Indie · Singleplayer

911 Operator
Shared: Casual · Singleplayer · Indie

That's not my Neighbor
Shared: Casual · Horror · Indie

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

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

Duck Detective: The Ghost of Glamping
Shared: Casual · Detective · Indie

Phoenix Wright: Ace Attorney Trilogy
Shared: Detective · Singleplayer · Crime

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

There Is No Game: Wrong Dimension
Shared: Indie · Casual · Singleplayer

Little Nightmares
Shared: Horror · Singleplayer · Indie

Fears to Fathom - Woodbury Getaway
Shared: Horror · Casual · Crime