Games like Seven Days Until Morning
Games like Seven Days Until Morning include ROUTINE, Poppy Playtime, SOMA, Alien: Isolation, and Outlast. We matched them by the tags players give Seven Days Until Morning on Steam (Adventure, Psychological Horror, Stylized, Sci-fi, and Horror): closest matches first, and among equally close ones the better-known games.

ROUTINE
Shared: Psychological Horror · Sci-fi · Adventure

Poppy Playtime
Shared: Horror · Psychological Horror · Singleplayer

SOMA
Shared: Psychological Horror · Horror · Sci-fi

Alien: Isolation
Shared: Horror · Sci-fi · Atmospheric

Outlast
Shared: Horror · Psychological Horror · Atmospheric

Observation
Shared: Adventure · Sci-fi · Horror

MiSide
Shared: Psychological Horror · Horror · Singleplayer

Little Nightmares II
Shared: Adventure · Horror · Psychological Horror

Lethal Company
Shared: Horror · Psychological Horror · Sci-fi

Little Nightmares
Shared: Adventure · Horror · Atmospheric

Dead Space
Shared: Horror · Sci-fi · Psychological Horror

Prey
Shared: Sci-fi · Horror · Atmospheric

Outer Wilds
Shared: Adventure · Atmospheric · Space

Fears to Fathom - Ironbark Lookout
Shared: Psychological Horror · Horror · Adventure

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

Still Wakes the Deep
Shared: Psychological Horror · Horror · Adventure

Mouthwashing
Shared: Psychological Horror · Horror · Atmospheric

Iron Lung
Shared: Psychological Horror · Horror · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Singleplayer

Stories Untold
Shared: Adventure · Horror · Psychological Horror

KARMA: The Dark World
Shared: Psychological Horror · Horror · Sci-fi

Blair Witch
Shared: Adventure · Psychological Horror · Horror

Moons of Madness
Shared: Adventure · Horror · Sci-fi

Stray
Shared: Adventure · Atmospheric · Singleplayer