Games like Penumbra Overture
Games like Penumbra Overture include Outlast, Poppy Playtime, Little Nightmares, SOMA, and Amnesia: The Dark Descent. We matched them by the tags players give Penumbra Overture on Steam (Horror, Adventure, First-Person, Survival Horror, and Indie): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · First-Person · Survival Horror

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

Little Nightmares
Shared: Horror · Adventure · Atmospheric

SOMA
Shared: Horror · Atmospheric · Psychological Horror

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

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

Bendy and the Dark Revival
Shared: Horror · First-Person · Adventure

Little Nightmares II
Shared: Horror · Adventure · Singleplayer

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

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

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

Penumbra: Black Plague Gold Edition
Shared: Horror · Adventure · First-Person

The Beast Inside
Shared: Horror · Adventure · First-Person

Layers of Fear (2016)
Shared: Horror · First-Person · Atmospheric

Five Nights at Freddy's: Security Breach
Shared: Horror · Survival Horror · First-Person

Five Nights at Freddy's
Shared: Horror · Survival Horror · Singleplayer

METRO 2033 Redux
Shared: Horror · Atmospheric · First-Person

Amnesia: Rebirth
Shared: First-Person · Horror · Adventure

Slender: The Arrival
Shared: Horror · First-Person · Survival Horror

Darkwood
Shared: Horror · Adventure · Survival Horror

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

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

Visage
Shared: Horror · Survival Horror · First-Person

The Outlast Trials
Shared: Horror · Survival Horror · First-Person