Games like GunShop
Games like GunShop include Outlast, Five Nights at Freddy's, The Forest, Resident Evil 7 Biohazard, and Poppy Playtime. We matched them by the tags players give GunShop on Steam (Indie, Survival Horror, Crafting, Horror, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Survival Horror · Horror · Atmospheric

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

The Forest
Shared: Horror · Crafting · Survival Horror

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

Poppy Playtime
Shared: Horror · Survival Horror · Singleplayer

Lethal Company
Shared: Horror · Survival Horror · Indie

Resident Evil Village
Shared: Survival Horror · Horror · Action

Outlast 2
Shared: Survival Horror · Horror · Psychological Horror

Sons Of The Forest
Shared: Survival Horror · Horror · Crafting

Dead Space
Shared: Survival Horror · Horror · Singleplayer

The Outlast Trials
Shared: Horror · Survival Horror · Psychological Horror

Escape the Backrooms
Shared: Horror · Survival Horror · Psychological Horror

Choo-Choo Charles
Shared: Survival Horror · Horror · Singleplayer

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

Five Nights at Freddy's 3
Shared: Survival Horror · Horror · Indie

Ultimate Custom Night
Shared: Horror · Survival Horror · Singleplayer

Slender: The Arrival
Shared: Survival Horror · Indie · Horror

Five Nights at Freddy's 2
Shared: Survival Horror · Horror · Indie

SOMA
Shared: Horror · Atmospheric · Survival Horror

Amnesia: The Bunker
Shared: Survival Horror · Horror · Atmospheric

The Beast Inside
Shared: Horror · Survival Horror · Indie

IMSCARED
Shared: Indie · Horror · Psychological Horror

Amnesia: The Dark Descent
Shared: Horror · Survival Horror · Atmospheric

Garten of Banban
Shared: Horror · Singleplayer · Survival Horror