Games like Sanguis Luna
Games like Sanguis Luna include Firewatch, What Remains of Edith Finch, A Plague Tale: Requiem, Five Nights at Freddy's: Secret of the Mimic, and Outer Wilds. We matched them by the tags players give Sanguis Luna on Steam (Adventure, Action-Adventure, Exploration, 3D, and First-Person): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Atmospheric · First-Person

What Remains of Edith Finch
Shared: Adventure · Exploration · Atmospheric

A Plague Tale: Requiem
Shared: Adventure · Action-Adventure · Exploration

Five Nights at Freddy's: Secret of the Mimic
Shared: Adventure · First-Person · Exploration

Outer Wilds
Shared: Exploration · Adventure · Atmospheric

Escape the Backrooms
Shared: Horror · First-Person · Adventure

PEAK
Shared: Adventure · Exploration · First-Person

Subliminal
Shared: Realistic · Atmospheric · First-Person

SILENT HILL: Townfall
Shared: Adventure · First-Person · Exploration

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

Poppy Playtime
Shared: First-Person · Horror · Dark

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

Total Chaos
Shared: Adventure · Action-Adventure · Exploration

SOMA
Shared: Atmospheric · Horror · Exploration

Inside the Backrooms
Shared: Adventure · Horror · Exploration

Lethal Company
Shared: First-Person · Exploration · Horror

Outlast
Shared: First-Person · Horror · Atmospheric

Little Nightmares II
Shared: Adventure · Horror · Atmospheric

POOLS
Shared: Exploration · Realistic · Atmospheric

Visage
Shared: Adventure · First-Person · Horror

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

CARIMARA: Beneath the forlorn limbs
Shared: Adventure · Exploration · 3D

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

The Exit 8
Shared: Exploration · First-Person · 3D