Games like Terror Brain: Night Out
Games like Terror Brain: Night Out include Outlast, MiSide, METRO 2033 Redux, Metro Exodus, and Half-Life: Alyx. We matched them by the tags players give Terror Brain: Night Out on Steam (Singleplayer, First-Person, Psychological Horror, Story Rich, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: First-Person · Psychological Horror · Singleplayer

MiSide
Shared: Psychological Horror · Story Rich · First-Person

METRO 2033 Redux
Shared: Story Rich · Singleplayer · Atmospheric

Metro Exodus
Shared: Singleplayer · Story Rich · First-Person

Half-Life: Alyx
Shared: Story Rich · Singleplayer · Female Protagonist

A Plague Tale: Innocence
Shared: Story Rich · Singleplayer · Female Protagonist

Dishonored
Shared: First-Person · Singleplayer · Stealth

Dishonored 2
Shared: First-Person · Singleplayer · Stealth

What Remains of Edith Finch
Shared: Story Rich · First-Person · Atmospheric

Resident Evil Village
Shared: First-Person · Singleplayer · Story Rich

METRO Last Light Redux
Shared: Singleplayer · Story Rich · Atmospheric

Little Nightmares II
Shared: Singleplayer · Psychological Horror · Atmospheric

Outlast 2
Shared: Psychological Horror · First-Person · Singleplayer

SOMA
Shared: Psychological Horror · Story Rich · Atmospheric

Ready or Not
Shared: Singleplayer · Realistic · First-Person

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

Little Nightmares
Shared: Singleplayer · Atmospheric · Story Rich

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

Portal 2
Shared: Singleplayer · First-Person · Story Rich

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

Hellblade: Senua's Sacrifice
Shared: Singleplayer · Atmospheric · Story Rich

BioShock Infinite
Shared: First-Person · Singleplayer · Story Rich

Tomb Raider Game of the Year
Shared: Singleplayer · Female Protagonist · Story Rich

Half-Life 2
Shared: Singleplayer · Story Rich · First-Person