Games like HANGAR 8
Games like HANGAR 8 include SOMA, Mouthwashing, ROUTINE, Lethal Company, and Outer Wilds. We matched them by the tags players give HANGAR 8 on Steam (Psychological Horror, Sci-fi, Hidden Object, Walking Simulator, and Investigation): closest matches first, and among equally close ones the better-known games.

SOMA
Shared: Psychological Horror · Sci-fi · Horror

Mouthwashing
Shared: Psychological Horror · Horror · Walking Simulator

ROUTINE
Shared: Sci-fi · Psychological Horror · Atmospheric

Lethal Company
Shared: Psychological Horror · Horror · Sci-fi

Outer Wilds
Shared: Exploration · Space · Sci-fi

Layers of Fear (2016)
Shared: Psychological Horror · Walking Simulator · Horror

Still Wakes the Deep
Shared: Psychological Horror · Horror · Walking Simulator

KARMA: The Dark World
Shared: Psychological Horror · Walking Simulator · Sci-fi

Phasmophobia
Shared: Psychological Horror · Horror · Investigation

Prey
Shared: Sci-fi · Space · Horror

What Remains of Edith Finch
Shared: Walking Simulator · Exploration · Atmospheric

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

Observation
Shared: Sci-fi · Space · Psychological Horror

Firewatch
Shared: Walking Simulator · Atmospheric · Exploration

No Man's Sky
Shared: Sci-fi · Space · Exploration

Moons of Madness
Shared: Sci-fi · Horror · Psychological Horror

The Park®
Shared: Psychological Horror · Walking Simulator · Horror

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Psychological Horror · Horror

Scanner Sombre
Shared: Walking Simulator · Exploration · Psychological Horror

The Exit 8
Shared: Walking Simulator · Psychological Horror · Exploration

Alien: Isolation
Shared: Sci-fi · Horror · Space

Dead Space
Shared: Sci-fi · Psychological Horror · Horror

Pacify
Shared: Psychological Horror · Horror · Exploration

Outlast
Shared: Psychological Horror · Horror · Atmospheric