Games like Implements of Hell
Games like Implements of Hell include Mouthwashing, What Remains of Edith Finch, Firewatch, Poppy Playtime, and Summer of '58. We matched them by the tags players give Implements of Hell on Steam (Walking Simulator, Psychological Horror, Atmospheric, Horror, and Thriller): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Psychological Horror · Horror · Atmospheric

What Remains of Edith Finch
Shared: Walking Simulator · Atmospheric · Mystery

Firewatch
Shared: Atmospheric · Walking Simulator · Mystery

Poppy Playtime
Shared: Horror · Psychological Horror · Dark

Summer of '58
Shared: Horror · Atmospheric · Psychological Horror

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

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

SOMA
Shared: Psychological Horror · Horror · Atmospheric

Sally Face - Episode One
Shared: Psychological Horror · Horror · Atmospheric

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · Atmospheric

Little Nightmares II
Shared: Horror · Atmospheric · Psychological Horror

Firework
Shared: Horror · Psychological Horror · Atmospheric

Little Nightmares
Shared: Atmospheric · Horror · Psychological Horror

Fears to Fathom - Ironbark Lookout
Shared: Psychological Horror · Horror · Atmospheric

The Park®
Shared: Psychological Horror · Walking Simulator · Horror

Outlast
Shared: Horror · Atmospheric · Psychological Horror

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Psychological · Horror

MiSide
Shared: Psychological Horror · Horror · Atmospheric

The Room Two
Shared: Atmospheric · Horror · Mystery

Garten of Banban
Shared: Horror · Psychological Horror · Atmospheric

Welcome to Kowloon
Shared: Psychological Horror · Atmospheric · Horror

Fran Bow
Shared: Psychological Horror · Horror · Atmospheric

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

ROUTINE
Shared: Psychological Horror · Atmospheric · Horror