Games like Nmnmah
Games like Nmnmah include Five Nights at Freddy's: Security Breach, Ready or Not, Outlast, Bendy and the Dark Revival, and Poppy Playtime. We matched them by the tags players give Nmnmah on Steam (Horror, Thriller, Realistic, Stealth, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · Stealth

Ready or Not
Shared: Realistic · Horror · Singleplayer

Outlast
Shared: Horror · Singleplayer · First-Person

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

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · Action · First-Person

Escape the Backrooms
Shared: Horror · Exploration · Singleplayer

Fears to Fathom - Ironbark Lookout
Shared: Horror · Thriller · Exploration

The Forest
Shared: Horror · Action · Exploration

Firewatch
Shared: Walking Simulator · Singleplayer · Exploration

Resident Evil Requiem
Shared: Horror · Action · Singleplayer

The Complex: Expedition
Shared: Horror · Realistic · Singleplayer

Amnesia: The Bunker
Shared: Horror · Stealth · Singleplayer

The Outlast Trials
Shared: Horror · Stealth · Action

Metro Exodus
Shared: Singleplayer · Horror · Action

The Escape: Together
Shared: Horror · Action · Realistic

Thief Simulator
Shared: Stealth · Singleplayer · Action

Resident Evil 4
Shared: Horror · Action · Singleplayer

Subliminal
Shared: Realistic · Singleplayer · Thriller

The Beast Inside
Shared: Horror · Action · Singleplayer

Summer of '58
Shared: Horror · Thriller · Walking Simulator

Thief
Shared: Stealth · Action · Singleplayer

Paper Dolls: Original /
Shared: Horror · Thriller · Action

METRO 2033 Redux
Shared: Horror · Action · Singleplayer