Games like Monotonous Days Are...
Games like Monotonous Days Are... include Dollmare, Five Nights at Freddy's: Security Breach, Papers, Please, SchoolBoy Runaway, and VERGE:Lost chapter. We matched them by the tags players give Monotonous Days Are... on Steam (Simulation, Walking Simulator, Hidden Object, 3D, and Horror): closest matches first, and among equally close ones the better-known games.

Dollmare
Shared: Simulation · 3D · Horror

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · Multiple Endings

Papers, Please
Shared: Simulation · Indie · Multiple Endings

SchoolBoy Runaway
Shared: Simulation · Horror · 3D

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

Platform 8
Shared: Walking Simulator · Simulation · Hidden Object

The Test
Shared: Simulation · Multiple Endings · Singleplayer

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

Buckshot Roulette
Shared: Horror · 3D · Indie

MiSide
Shared: Horror · 3D · Singleplayer

Totally Accurate Battle Simulator
Shared: Simulation · Singleplayer · Indie

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

September 7th
Shared: Walking Simulator · Horror · Simulation

Zoochosis
Shared: 3D · Simulation · Horror

Garten of Banban
Shared: Horror · Singleplayer · 3D

Dead Signal
Shared: Simulation · Hidden Object · Horror

Summon
Shared: Simulation · Horror · Hidden Object

False Dream
Shared: Walking Simulator · Hidden Object · Horror

The Cabin Factory
Shared: Walking Simulator · Horror · Simulation

Scanner Sombre
Shared: Walking Simulator · Horror · Indie

The Test: Hypothesis Rising
Shared: Simulation · Multiple Endings · Horror

The Exit 8
Shared: Walking Simulator · Horror · 3D

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

Killer Frequency
Shared: Horror · Simulation · Walking Simulator