Games like 悪魔の家 -6 Day Nightmare-
Games like 悪魔の家 -6 Day Nightmare- include Ready or Not, Totally Accurate Battle Simulator, Little Nightmares, The Forest, and Little Nightmares II. We matched them by the tags players give 悪魔の家 -6 Day Nightmare- on Steam (Adventure, Horror, Realistic, Singleplayer, and Simulation): closest matches first, and among equally close ones the better-known games.

Ready or Not
Shared: Realistic · Singleplayer · Horror

Totally Accurate Battle Simulator
Shared: Simulation · Singleplayer · Realistic

Little Nightmares
Shared: Horror · Adventure · Singleplayer

The Forest
Shared: Horror · Adventure · Singleplayer

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

Poppy Playtime
Shared: Horror · Singleplayer · Adventure

Microsoft Flight Simulator (2020) 40th Anniversary Edition
Shared: Realistic · Simulation · Singleplayer

Gold Mining Simulator
Shared: Simulation · Realistic · Singleplayer

Thief Simulator
Shared: Singleplayer · Simulation · Adventure

VERGE:Lost chapter
Shared: Horror · Adventure · Indie

Bendy and the Dark Revival
Shared: Horror · Singleplayer · Adventure

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

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

Microsoft Flight Simulator X: Steam Edition
Shared: Realistic · Simulation · Adventure

Stray
Shared: Adventure · Singleplayer · Horror

Drug Dealer Simulator
Shared: Simulation · Singleplayer · Indie

The Beast Inside
Shared: Adventure · Horror · Singleplayer

Visage
Shared: Horror · Adventure · Singleplayer

鬼谷八荒 Tale of Immortal
Shared: Singleplayer · Simulation · Adventure

The Isle
Shared: Simulation · Realistic · Horror

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

[Chillas Art] The Convenience Store
Shared: Horror · Adventure · Indie

The Mortuary Assistant
Shared: Horror · Singleplayer · Simulation

The Complex: Expedition
Shared: Horror · Realistic · Singleplayer