Games like 24H Stories: The Blackout
Games like 24H Stories: The Blackout include Five Nights at Freddy's: Security Breach, Poppy Playtime, No, I'm not a Human, MiSide, and Phasmophobia. We matched them by the tags players give 24H Stories: The Blackout on Steam (First-Person, Horror, Singleplayer, Multiple Endings, and Thriller): closest matches first, and among equally close ones the better-known games.

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

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

No, I'm not a Human
Shared: Horror · Singleplayer · Multiple Endings

MiSide
Shared: Horror · First-Person · Singleplayer

Phasmophobia
Shared: Horror · First-Person · Supernatural

Buckshot Roulette
Shared: Horror · First-Person · Singleplayer

Garten of Banban
Shared: Horror · First-Person · Singleplayer

Firework
Shared: Horror · Mystery · Singleplayer

Subliminal
Shared: Singleplayer · Horror · First-Person

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

The Mortuary Assistant
Shared: Horror · Singleplayer · Mystery

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

Firewatch
Shared: First-Person · Singleplayer · Mystery

Garten of Banban 2
Shared: Horror · First-Person · Singleplayer

The Scourge Tai ng
Shared: Horror · Singleplayer · First-Person

CloverPit
Shared: First-Person · Horror · Singleplayer

Outlast
Shared: First-Person · Horror · Singleplayer

Dollmare
Shared: Horror · First-Person · 3D

Ghostwire: Tokyo
Shared: Singleplayer · First-Person · Horror

Five Nights at Freddy's 2
Shared: Horror · Singleplayer · First-Person

Mouthwashing
Shared: Horror · Psychological · Indie

Escape the Backrooms
Shared: Horror · First-Person · Singleplayer

Dark Deception
Shared: Horror · First-Person · Singleplayer

Choo-Choo Charles
Shared: Horror · First-Person · Singleplayer