Games like Afterdream
Games like Afterdream include DISTRAINT: Deluxe Edition, DISTRAINT 2, Mouthwashing, Sally Face - Episode One, and OMORI. We matched them by the tags players give Afterdream on Steam (Psychological Horror, Horror, Adventure, 2D, and Atmospheric): closest matches first, and among equally close ones the better-known games.

DISTRAINT: Deluxe Edition
Shared: Psychological Horror · Horror · 2D

DISTRAINT 2
Shared: Psychological Horror · Horror · Atmospheric

Mouthwashing
Shared: Psychological Horror · Horror · Atmospheric

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

OMORI
Shared: Psychological Horror · Story Rich · Horror

Fran Bow
Shared: Psychological Horror · Horror · Adventure

What Remains of Edith Finch
Shared: Atmospheric · Story Rich · Adventure

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

The Cat Lady
Shared: Horror · Psychological Horror · Adventure

The Medium
Shared: Horror · Adventure · Psychological Horror

SILENT HILL 2
Shared: Psychological Horror · Horror · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Story Rich

Tales of the Black Forest
Shared: Horror · Adventure · Pixel Graphics

SILENT HILL f
Shared: Psychological Horror · Horror · Adventure

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

Impostor Factory
Shared: Adventure · 2D · Story Rich

Mad Father
Shared: Psychological Horror · Horror · 2D

Little Nightmares
Shared: Horror · Adventure · Atmospheric

Oxenfree
Shared: Atmospheric · Story Rich · Adventure

Finding Paradise
Shared: Adventure · 2D · Story Rich

The Witch's House MV
Shared: Horror · 2D · Psychological Horror

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

Detention
Shared: Horror · Psychological Horror · Atmospheric

Firework
Shared: Horror · Psychological Horror · 2D