Games like The Lost Souls
Games like The Lost Souls include What Remains of Edith Finch, Firewatch, Layers of Fear (2016), MiSide, and SOMA. We matched them by the tags players give The Lost Souls on Steam (Indie, Horror, First-Person, Gothic, and Story Rich): closest matches first, and among equally close ones the better-known games.

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

Firewatch
Shared: Story Rich · First-Person · Walking Simulator

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

MiSide
Shared: Horror · Story Rich · First-Person

SOMA
Shared: Horror · Story Rich · First-Person

Amnesia: A Machine For Pigs
Shared: Horror · First-Person · Story Rich

Gone Home
Shared: Indie · First-Person · Short

The Beginner's Guide
Shared: Indie · Story Rich · First-Person

Poppy Playtime
Shared: Horror · First-Person · Puzzle

Outer Wilds
Shared: Story Rich · Exploration · Indie

Mouthwashing
Shared: Horror · Indie · Story Rich

In Sound Mind
Shared: Horror · Story Rich · Puzzle

Bendy and the Ink Machine
Shared: Horror · First-Person · Puzzle

Among the Sleep - Enhanced Edition
Shared: Indie · Horror · First-Person

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

Inside the Backrooms
Shared: Horror · Puzzle · First-Person

Buckshot Roulette
Shared: Horror · First-Person · Indie

The Exit 8
Shared: Horror · Puzzle · Exploration

INFRA
Shared: First-Person · Puzzle · Indie

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

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

Sally Face - Episode One
Shared: Indie · Horror · Story Rich

Amnesia: Rebirth
Shared: First-Person · Horror · Story Rich

Outlast
Shared: Horror · First-Person · Atmospheric