Games like IMAGO: Beyond the Nightmares
Games like IMAGO: Beyond the Nightmares include Little Nightmares II, Little Nightmares, MiSide, Outlast, and Fran Bow. We matched them by the tags players give IMAGO: Beyond the Nightmares on Steam (Adventure, Psychological Horror, Atmospheric, 3D, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Little Nightmares II
Shared: Adventure · Singleplayer · Atmospheric

Little Nightmares
Shared: Adventure · Atmospheric · Singleplayer

MiSide
Shared: Psychological Horror · Singleplayer · 3D

Outlast
Shared: Atmospheric · Psychological Horror · Singleplayer

Fran Bow
Shared: Psychological Horror · Adventure · Atmospheric

Sally Face - Episode One
Shared: Psychological Horror · Adventure · Indie

Outlast 2
Shared: Psychological Horror · Singleplayer · Atmospheric

SOMA
Shared: Psychological Horror · Atmospheric · Dark

Tiny Bunny
Shared: Atmospheric · Psychological Horror · Singleplayer

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Adventure · Singleplayer

Mouthwashing
Shared: Psychological Horror · Atmospheric · Indie

Raging Loop
Shared: Adventure · Psychological Horror · Indie

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

The Room Three
Shared: Adventure · Atmospheric · Singleplayer

Layers of Fear (2016)
Shared: Psychological Horror · Atmospheric · Adventure

INSIDE
Shared: Atmospheric · Adventure · Singleplayer

Blair Witch
Shared: Adventure · Psychological Horror · Indie

The Medium
Shared: Adventure · Psychological Horror · Atmospheric

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

Poppy Playtime
Shared: Singleplayer · Psychological Horror · Adventure

DISTRAINT: Deluxe Edition
Shared: Psychological Horror · Adventure · Indie

Still Wakes the Deep
Shared: Psychological Horror · Adventure · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Singleplayer

The Room Two
Shared: Atmospheric · Adventure · Hidden Object