Games like TheSpoiler
Games like TheSpoiler include Five Nights at Freddy's, Lobotomy Corporation | Monster Management Simulation, Layers of Fear (2016), No, I'm not a Human, and Mouthwashing. We matched them by the tags players give TheSpoiler on Steam (Simulation, Horror, Psychological Horror, Singleplayer, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

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

Lobotomy Corporation | Monster Management Simulation
Shared: Psychological Horror · Simulation · Horror

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Walking Simulator

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

Mouthwashing
Shared: Horror · Psychological Horror · Indie

MiSide
Shared: Psychological Horror · Horror · Singleplayer

Poppy Playtime
Shared: Horror · Singleplayer · Psychological Horror

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

[Chillas Art] The Convenience Store
Shared: Horror · Psychological Horror · Simulation

Visage
Shared: Horror · Psychological Horror · Singleplayer

Firework
Shared: Horror · Indie · Psychological Horror

Outlast
Shared: Horror · Psychological Horror · Singleplayer

Locked Up
Shared: Horror · Simulation · Indie

VERGE:Lost chapter
Shared: Horror · Simulation · Walking Simulator

Garten of Banban
Shared: Horror · Singleplayer · Psychological Horror

Five Nights at Freddy's 2
Shared: Horror · Singleplayer · Psychological Horror

Chinese Parents
Shared: Psychological Horror · Simulation · Singleplayer

Welcome to the Game II
Shared: Horror · Psychological Horror · Simulation

Rise of Insanity
Shared: Horror · Simulation · Indie

Five Nights at Freddy's 3
Shared: Horror · Singleplayer · Psychological Horror

Still Wakes the Deep
Shared: Horror · Psychological Horror · Walking Simulator

The Test
Shared: Simulation · Psychological Horror · Singleplayer

Buckshot Roulette
Shared: Horror · Singleplayer · Indie

Welcome to the Game
Shared: Horror · Simulation · Psychological Horror