Games like ALEON's Nightmare
Games like ALEON's Nightmare include Outlast, Little Nightmares, Still Wakes the Deep, Blair Witch, and Fran Bow. We matched them by the tags players give ALEON's Nightmare on Steam (Indie, Adventure, Horror, Psychological Horror, and Gore): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Psychological Horror · Gore

Little Nightmares
Shared: Horror · Adventure · Indie

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

Blair Witch
Shared: Adventure · Horror · Indie

Fran Bow
Shared: Psychological Horror · Horror · Adventure

Lucius
Shared: Adventure · Horror · Indie

Little Nightmares II
Shared: Adventure · Horror · Psychological Horror

Mouthwashing
Shared: Horror · Psychological Horror · Indie

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

Neverending Nightmares
Shared: Indie · Horror · Psychological Horror

The Medium
Shared: Adventure · Horror · Psychological Horror

The Beast Inside
Shared: Adventure · Horror · Indie

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

Outlast 2
Shared: Horror · Psychological Horror · Gore

Remothered: Tormented Fathers
Shared: Horror · Adventure · Psychological Horror

Home Sweet Home
Shared: Adventure · Horror · Indie

Detention
Shared: Indie · Horror · Psychological Horror

Little Misfortune
Shared: Indie · Psychological Horror · Adventure

Apsulov: End of Gods
Shared: Adventure · Horror · Indie

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

Infliction
Shared: Horror · Adventure · Psychological Horror

SOMA
Shared: Horror · Psychological Horror · Gore

Granny: Chapter Two
Shared: Adventure · Indie · Horror

Maid of Sker
Shared: Adventure · Horror · Gore