Games like The Sand Man
Games like The Sand Man include OMORI, DISTRAINT: Deluxe Edition, Tales of the Black Forest, OneShot, and The Witch's House MV. We matched them by the tags players give The Sand Man on Steam (Indie, Casual, Adventure, Horror, and 2D): closest matches first, and among equally close ones the better-known games.

OMORI
Shared: Indie · Pixel Graphics · Story Rich

DISTRAINT: Deluxe Edition
Shared: Indie · Horror · Adventure

Tales of the Black Forest
Shared: Indie · Horror · Pixel Graphics

OneShot
Shared: Indie · Pixel Graphics · Story Rich

The Witch's House MV
Shared: Indie · Horror · 2D

Ib
Shared: Indie · Horror · Pixel Graphics

Mad Father
Shared: Horror · 2D · Pixel Graphics

Sally Face - Episode One
Shared: Indie · Horror · Story Rich

Fran Bow
Shared: Indie · Horror · Adventure

Little Misfortune
Shared: Indie · Adventure · Horror

Little Nightmares
Shared: Horror · Adventure · Indie

Undertale
Shared: Story Rich · Indie · Pixel Graphics

Milk outside a bag of milk outside a bag of milk
Shared: Indie · Pixel Graphics · Story Rich

Five Nights at Freddy's: Into the Pit
Shared: Horror · Adventure · Pixel Graphics

To the Moon
Shared: Indie · Adventure · Story Rich

Papers, Please
Shared: Indie · Pixel Graphics · Multiple Endings

Angels of Death
Shared: Horror · Pixel Graphics · 2D

KinitoPET
Shared: Indie · Horror · 2D

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

Impostor Factory
Shared: Adventure · Pixel Graphics · Story Rich

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Casual

Hellblade: Senua's Sacrifice
Shared: Adventure · Story Rich · Horror

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

Alicemare
Shared: Indie · Adventure · Pixel Graphics