Games like Flan's MS
Games like Flan's MS include DISTRAINT: Deluxe Edition, OMORI, OneShot, Impostor Factory, and Sally Face - Episode One. We matched them by the tags players give Flan's MS on Steam (Psychological Horror, Pixel Graphics, Story Rich, Atmospheric, and Singleplayer): closest matches first, and among equally close ones the better-known games.

DISTRAINT: Deluxe Edition
Shared: Psychological Horror · Pixel Graphics · Story Rich

OMORI
Shared: Psychological Horror · Story Rich · Pixel Graphics

OneShot
Shared: Pixel Graphics · Story Rich · Atmospheric

Impostor Factory
Shared: Story Rich · Pixel Graphics · 2D

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

DISTRAINT 2
Shared: Psychological Horror · Story Rich · Atmospheric

MiSide
Shared: Psychological Horror · Story Rich · Singleplayer

Tales of the Black Forest
Shared: Pixel Graphics · Story Rich · Adventure

Little Nightmares
Shared: Atmospheric · Singleplayer · Adventure

Little Nightmares II
Shared: Singleplayer · Psychological Horror · Adventure

Fran Bow
Shared: Psychological Horror · Story Rich · Adventure

The Witch's House MV
Shared: Pixel Graphics · Psychological Horror · 2D

Mad Father
Shared: Psychological Horror · Pixel Graphics · 2D

Tiny Bunny
Shared: Story Rich · Psychological Horror · Atmospheric

FAITH: The Unholy Trinity
Shared: Pixel Graphics · Psychological Horror · Story Rich

SANABI
Shared: Pixel Graphics · Story Rich · Singleplayer

SOMA
Shared: Psychological Horror · Story Rich · Atmospheric

Firewatch
Shared: Story Rich · Atmospheric · Adventure

Little Misfortune
Shared: Psychological Horror · Story Rich · Adventure

SILENT HILL 2
Shared: Psychological Horror · Story Rich · Atmospheric

Finding Paradise
Shared: Pixel Graphics · Story Rich · 2D

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

To the Moon
Shared: Story Rich · Pixel Graphics · Singleplayer

No, I'm not a Human
Shared: Psychological Horror · Story Rich · Singleplayer