Games like The Office Killer
Games like The Office Killer include Poppy Playtime, Inside the Backrooms, Outlast, Escape the Backrooms, and Buckshot Roulette. We matched them by the tags players give The Office Killer on Steam (Simulation, Horror, Hidden Object, Puzzle, and Hacking): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Puzzle · Singleplayer

Inside the Backrooms
Shared: Horror · Puzzle · Psychological Horror

Outlast
Shared: Horror · Psychological Horror · Atmospheric

Escape the Backrooms
Shared: Horror · Psychological Horror · Co-op

Buckshot Roulette
Shared: Horror · Singleplayer · 3D

Little Nightmares II
Shared: Horror · Puzzle · Singleplayer

MiSide
Shared: Horror · Psychological Horror · 3D

Garten of Banban
Shared: Horror · Puzzle · Singleplayer

Resident Evil 7 Biohazard
Shared: Horror · Singleplayer · Survival Horror

Dead Signal
Shared: Simulation · Horror · Hidden Object

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

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

Little Nightmares
Shared: Horror · Puzzle · Atmospheric

The Room Two
Shared: Puzzle · Hidden Object · Horror

Amnesia: The Dark Descent
Shared: Horror · Puzzle · Psychological Horror

Outlast 2
Shared: Horror · Psychological Horror · Singleplayer

SOMA
Shared: Horror · Psychological Horror · Atmospheric

Bendy and the Ink Machine
Shared: Horror · Puzzle · Singleplayer

Lethal Company
Shared: Horror · Co-op · Psychological Horror

The Outlast Trials
Shared: Horror · Psychological Horror · Co-op

DEVOUR
Shared: Horror · Psychological Horror · Survival Horror

Garten of Banban 2
Shared: Horror · Puzzle · Singleplayer

Phasmophobia
Shared: Horror · Psychological Horror · Co-op

Welcome to the Game
Shared: Horror · Simulation · Hacking