Games like Single Player: Horror
Games like Single Player: Horror include Resident Evil Village, Five Nights at Freddy's: Security Breach, Resident Evil Requiem, Resident Evil 7 Biohazard, and Resident Evil 4. We matched them by the tags players give Single Player: Horror on Steam (FMV, Action, Singleplayer, First-Person, and Horror): closest matches first, and among equally close ones the better-known games.

Resident Evil Village
Shared: Singleplayer · First-Person · Action

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

Resident Evil Requiem
Shared: Action · Horror · First-Person

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

Resident Evil 4
Shared: Action · Horror · Singleplayer

Outlast
Shared: First-Person · Horror · Singleplayer

Love Is All Around
Shared: FMV · Singleplayer · First-Person

Late Shift
Shared: FMV · Choose Your Own Adventure · Interactive Fiction

Outlast 2
Shared: Horror · First-Person · Singleplayer

Resident Evil 3
Shared: Action · Horror · Singleplayer

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

Resident Evil 2
Shared: Singleplayer · Horror · Action

Poppy Playtime
Shared: Singleplayer · Horror · First-Person

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

Dark Deception
Shared: Horror · Singleplayer · First-Person

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

Detroit: Become Human
Shared: Singleplayer · Multiple Endings · Cinematic

The Forest
Shared: Horror · Action · First-Person

Ultimate Custom Night
Shared: Singleplayer · Horror · First-Person

No, I'm not a Human
Shared: Horror · Singleplayer · First-Person

Dead by Daylight
Shared: Horror · Survival Horror · First-Person

Trepang2
Shared: Singleplayer · Horror · Action

Alien: Isolation
Shared: Horror · First-Person · Survival Horror

Bright Memory: Infinite
Shared: Action · Singleplayer · First-Person