Games like Solo Path
Games like Solo Path include Poppy Playtime, Resident Evil 7 Biohazard, Outlast, Amnesia: The Dark Descent, and SOMA. We matched them by the tags players give Solo Path on Steam (Horror, Psychological Horror, Puzzle, Adventure, and Exploration): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Puzzle · Singleplayer

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

Outlast
Shared: Horror · Psychological Horror · First-Person

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Puzzle

SOMA
Shared: Horror · Psychological Horror · Exploration

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

Inside the Backrooms
Shared: Horror · Puzzle · Psychological Horror

Little Nightmares II
Shared: Horror · Adventure · Puzzle

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

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

Little Nightmares
Shared: Horror · Adventure · Singleplayer

Lethal Company
Shared: Horror · First-Person · Psychological Horror

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Singleplayer

The Beast Inside
Shared: Horror · Adventure · First-Person

Scorn
Shared: Horror · Puzzle · Gore

MiSide
Shared: Psychological Horror · Horror · Singleplayer

Outer Wilds
Shared: Exploration · Adventure · Puzzle

Visage
Shared: Horror · Psychological Horror · Singleplayer

Ready or Not
Shared: Horror · Singleplayer · Psychological Horror

Bendy and the Ink Machine
Shared: Horror · Puzzle · Singleplayer

Garten of Banban
Shared: Horror · Psychological Horror · Singleplayer

Fran Bow
Shared: Psychological Horror · Horror · Puzzle

Sally Face - Episode One
Shared: Psychological Horror · Horror · Puzzle

Granny
Shared: Horror · Puzzle · Singleplayer