Games like Strange Nightmares
Games like Strange Nightmares include Five Nights at Freddy's, Poppy Playtime, Outlast, Outlast 2, and Pony Island. We matched them by the tags players give Strange Nightmares on Steam (Survival Horror, Experimental, Horror, Pixel Graphics, and Singleplayer): closest matches first, and among equally close ones the better-known games.

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

Poppy Playtime
Shared: Horror · Singleplayer · Survival Horror

Outlast
Shared: Survival Horror · Horror · Singleplayer

Outlast 2
Shared: Survival Horror · Horror · Singleplayer

Pony Island
Shared: Pixel Graphics · Singleplayer · Horror

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

Visage
Shared: Survival Horror · Horror · Psychological Horror

DISTRAINT: Deluxe Edition
Shared: Horror · Pixel Graphics · Psychological Horror

SOMA
Shared: Horror · Survival Horror · Psychological Horror

Five Nights at Freddy's 4
Shared: Survival Horror · Horror · Singleplayer

Look Outside
Shared: Survival Horror · Pixel Graphics · Horror

Ultimate Custom Night
Shared: Horror · Survival Horror · Singleplayer

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

Mad Father
Shared: Horror · Pixel Graphics · Survival Horror

Firework
Shared: Horror · 2D · Singleplayer

Five Nights at Freddy's: Sister Location
Shared: Survival Horror · Horror · Singleplayer

Resident Evil Village
Shared: Survival Horror · Horror · Singleplayer

Little Nightmares
Shared: Horror · Singleplayer · Dark

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

Dead Space
Shared: Survival Horror · Horror · Singleplayer

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

The Witch's House MV
Shared: Horror · Pixel Graphics · 2D

IMSCARED
Shared: Horror · Pixel Graphics · Singleplayer

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