Games like Jumpscare Simulator: Deluxe Supporter Edition
Games like Jumpscare Simulator: Deluxe Supporter Edition include Outlast, Firewatch, Poppy Playtime, Inside the Backrooms, and Layers of Fear (2016). We matched them by the tags players give Jumpscare Simulator: Deluxe Supporter Edition on Steam (Adventure, Walking Simulator, FPS, 3D, and First-Person): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: First-Person · Atmospheric · Adventure

Firewatch
Shared: Adventure · Walking Simulator · Atmospheric

Poppy Playtime
Shared: First-Person · Adventure · Horror

Inside the Backrooms
Shared: Adventure · Survival Horror · Horror

Layers of Fear (2016)
Shared: Walking Simulator · First-Person · Atmospheric

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

Choo-Choo Charles
Shared: First-Person · Survival Horror · 3D

From The Darkness
Shared: Walking Simulator · First-Person · Adventure

Garten of Banban
Shared: First-Person · 3D · Horror

Slender: The Arrival
Shared: First-Person · Walking Simulator · Survival Horror

MiSide
Shared: First-Person · 3D · Atmospheric

Blair Witch
Shared: Adventure · First-Person · Walking Simulator

Visage
Shared: Adventure · First-Person · Survival Horror

Among the Sleep - Enhanced Edition
Shared: Adventure · Walking Simulator · First-Person

SOMA
Shared: Atmospheric · Horror · First-Person

Welcome to Kowloon
Shared: Adventure · Walking Simulator · Atmospheric

ROUTINE
Shared: Adventure · Atmospheric · Walking Simulator

Garten of Banban 2
Shared: First-Person · 3D · Walking Simulator

Resident Evil Requiem
Shared: FPS · First-Person · Survival Horror

Amnesia: A Machine For Pigs
Shared: Walking Simulator · First-Person · Atmospheric

Scanner Sombre
Shared: Walking Simulator · Adventure · First-Person

The Hat Man: Shadow Ward
Shared: Adventure · First-Person · Walking Simulator

Amnesia: The Dark Descent
Shared: First-Person · Atmospheric · Adventure

Little Nightmares
Shared: Adventure · Atmospheric · Horror