Games like Noctem
Games like Noctem include Poppy Playtime, Outlast, SOMA, Lethal Company, and The Beast Inside. We matched them by the tags players give Noctem on Steam (Adventure, Indie, Action, Psychological Horror, and Horror): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · First-Person · Psychological Horror

Outlast
Shared: Horror · First-Person · Psychological Horror

SOMA
Shared: Psychological Horror · Horror · Atmospheric

Lethal Company
Shared: Horror · First-Person · Psychological Horror

The Beast Inside
Shared: Adventure · Horror · Action

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · First-Person

Little Nightmares
Shared: Adventure · Horror · Indie

Bendy and the Dark Revival
Shared: Horror · Action · Adventure

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Survival Horror

Bendy and the Ink Machine
Shared: Horror · First-Person · Indie

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

Little Nightmares II
Shared: Adventure · Horror · Psychological Horror

What Remains of Edith Finch
Shared: Adventure · First-Person · Indie

Inside the Backrooms
Shared: Horror · Psychological Horror · Adventure

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

Penumbra Overture
Shared: Adventure · Horror · Indie

Outlast 2
Shared: Psychological Horror · Horror · First-Person

Backrooms: Escape Together
Shared: Horror · Psychological Horror · First-Person

Escape the Backrooms
Shared: Horror · Psychological Horror · Adventure

Among the Sleep - Enhanced Edition
Shared: Indie · Adventure · Horror

Firewatch
Shared: Adventure · First-Person · Indie

Resident Evil Village
Shared: Horror · Action · First-Person

Visage
Shared: Psychological Horror · Horror · Adventure

Darkwood
Shared: Adventure · Horror · Psychological Horror