Games like Nonsolar
Games like Nonsolar include Outlast, SOMA, Dead Space, Darkwood, and Poppy Playtime. We matched them by the tags players give Nonsolar on Steam (Survival Horror, Horror, Psychological Horror, Adventure, and Action): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Survival Horror · Psychological Horror

SOMA
Shared: Horror · Psychological Horror · Survival Horror

Dead Space
Shared: Survival Horror · Horror · Psychological Horror

Darkwood
Shared: Survival Horror · Horror · Psychological Horror

Poppy Playtime
Shared: Horror · Survival Horror · Singleplayer

Resident Evil 4
Shared: Horror · Survival Horror · Action

Little Nightmares
Shared: Horror · Adventure · Singleplayer

Outlast 2
Shared: Horror · Survival Horror · Psychological Horror

The Evil Within 2
Shared: Survival Horror · Horror · Psychological Horror

Resident Evil Village
Shared: Survival Horror · Horror · Action

Little Nightmares II
Shared: Horror · Adventure · Singleplayer

SILENT HILL 2
Shared: Horror · Psychological Horror · Survival Horror

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

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

Resident Evil Requiem
Shared: Survival Horror · Horror · Action

Escape the Backrooms
Shared: Horror · Psychological Horror · Survival Horror

Lethal Company
Shared: Horror · Survival Horror · Psychological Horror

The Beast Inside
Shared: Horror · Survival Horror · Adventure

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

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

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

Dead Space (2008)
Shared: Horror · Survival Horror · Action

SILENT HILL f
Shared: Horror · Psychological Horror · Survival Horror

ROUTINE
Shared: Psychological Horror · Singleplayer · Sci-fi