Games like The Midnight Biohazard
Games like The Midnight Biohazard include No, I'm not a Human, Firewatch, Mouthwashing, What Remains of Edith Finch, and Outlast. We matched them by the tags players give The Midnight Biohazard on Steam (Walking Simulator, First-Person, 3D, Horror, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

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

Firewatch
Shared: Walking Simulator · First-Person · Atmospheric

Mouthwashing
Shared: Horror · Psychological Horror · Walking Simulator

What Remains of Edith Finch
Shared: Walking Simulator · First-Person · Atmospheric

Outlast
Shared: First-Person · Horror · Psychological Horror

Layers of Fear (2016)
Shared: Walking Simulator · Horror · First-Person

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

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · First-Person

The Cabin Factory
Shared: Walking Simulator · Horror · Psychological Horror

MiSide
Shared: Psychological Horror · First-Person · Horror

Poppy Playtime
Shared: Horror · First-Person · Psychological Horror

Still Wakes the Deep
Shared: Horror · First-Person · Psychological Horror

SOMA
Shared: Horror · Psychological Horror · Atmospheric

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

Phasmophobia
Shared: Horror · Psychological Horror · First-Person

Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · 3D

The Stanley Parable
Shared: Walking Simulator · First-Person · Psychological

The Park®
Shared: Walking Simulator · Horror · First-Person

Summer of '58
Shared: Horror · Walking Simulator · First-Person

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

Buckshot Roulette
Shared: First-Person · Horror · 3D

[Chillas Art] The Convenience Store
Shared: Horror · Psychological Horror · First-Person

Fears to Fathom - Woodbury Getaway
Shared: First-Person · Psychological Horror · Horror

The Exit 8
Shared: Walking Simulator · Horror · First-Person