Games like Curse
Games like Curse include Poppy Playtime, The Room, Outlast, Five Nights at Freddy's, and The Room Two. We matched them by the tags players give Curse on Steam (Indie, Adventure, Horror, First-Person, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · First-Person · Singleplayer

The Room
Shared: Adventure · Atmospheric · Indie

Outlast
Shared: Horror · First-Person · Atmospheric

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

The Room Two
Shared: Atmospheric · Horror · Adventure

The Forest
Shared: Horror · Adventure · First-Person

Little Nightmares
Shared: Horror · Adventure · Atmospheric

The Room Three
Shared: Adventure · Indie · Atmospheric

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Survival Horror

Bendy and the Dark Revival
Shared: Horror · First-Person · Adventure

Bendy and the Ink Machine
Shared: Horror · First-Person · Indie

Penumbra Overture
Shared: Adventure · Horror · Indie

Inside the Backrooms
Shared: Horror · Survival Horror · Adventure

Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · Survival Horror

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

The Room 4: Old Sins
Shared: Adventure · Puzzle · Horror

The Beast Inside
Shared: Adventure · Horror · First-Person

Among the Sleep - Enhanced Edition
Shared: Indie · Horror · Adventure

The Hat Man: Shadow Ward
Shared: Indie · Horror · Adventure

Resident Evil Village
Shared: Horror · First-Person · Survival Horror

Firewatch
Shared: Adventure · Atmospheric · First-Person

MiSide
Shared: Horror · First-Person · Atmospheric

Lethal Company
Shared: Horror · First-Person · Survival Horror

Slender: The Arrival
Shared: Horror · Indie · First-Person