Games like Deluded Mind
Games like Deluded Mind include Outlast, Outlast 2, Resident Evil 7 Biohazard, Amnesia: The Dark Descent, and Poppy Playtime. We matched them by the tags players give Deluded Mind on Steam (Indie, Adventure, Gore, Violent, and Horror): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Gore · First-Person

Outlast 2
Shared: Horror · Gore · Psychological Horror

Resident Evil 7 Biohazard
Shared: Horror · Gore · Singleplayer

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

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

Scorn
Shared: Gore · Horror · Atmospheric

Fran Bow
Shared: Psychological Horror · Adventure · Indie

Little Nightmares
Shared: Adventure · Horror · Indie

Mouthwashing
Shared: Horror · Indie · Psychological Horror

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

Blair Witch
Shared: Adventure · Indie · Horror

No, I'm not a Human
Shared: Indie · Horror · Psychological Horror

The Beast Inside
Shared: Adventure · Horror · Indie

SOMA
Shared: Horror · Psychological Horror · Gore

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

Lucius
Shared: Adventure · Horror · Gore

Home Sweet Home
Shared: Adventure · Gore · Indie

Buckshot Roulette
Shared: Horror · Indie · First-Person

MiSide
Shared: Psychological Horror · Horror · Singleplayer

Raging Loop
Shared: Adventure · Indie · Psychological Horror

Granny
Shared: Horror · Indie · Singleplayer

Still Wakes the Deep
Shared: Gore · Horror · Psychological Horror

Resident Evil Village
Shared: Horror · Singleplayer · Gore

CARRION
Shared: Gore · Indie · Horror