Games like First Session - Collector Edition DLC
Games like First Session - Collector Edition DLC include Mouthwashing, No, I'm not a Human, SOMA, Fran Bow, and Layers of Fear (2016). We matched them by the tags players give First Session - Collector Edition DLC on Steam (Indie, Psychological Horror, Horror, Story Rich, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Psychological Horror · Horror · Story Rich

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

SOMA
Shared: Psychological Horror · Horror · Story Rich

Fran Bow
Shared: Psychological Horror · Story Rich · Horror

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

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

Still Wakes the Deep
Shared: Psychological Horror · Horror · Story Rich

Detention
Shared: Indie · Horror · Psychological Horror

MiSide
Shared: Psychological Horror · Story Rich · Horror

Outlast
Shared: Horror · Psychological Horror · Atmospheric

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

Firewatch
Shared: Story Rich · Atmospheric · Indie

FAITH: The Unholy Trinity
Shared: Horror · Psychological Horror · Indie

Little Nightmares
Shared: Horror · Atmospheric · Indie

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Story Rich · Psychological

Fears to Fathom - Norwood Hitchhike
Shared: Psychological Horror · Horror · Atmospheric

The Beginner's Guide
Shared: Indie · Story Rich · Atmospheric

Layers of Fear 2 (2019)
Shared: Psychological Horror · Indie · Horror

Little Nightmares II
Shared: Horror · Psychological Horror · Atmospheric

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

Outlast 2
Shared: Psychological Horror · Horror · Atmospheric

Amnesia: A Machine For Pigs
Shared: Horror · Story Rich · Psychological Horror

OMORI
Shared: Psychological Horror · Indie · Story Rich

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