Games like Castle in the Sands
Games like Castle in the Sands include Undertale, OneShot, The Witcher 3: Wild Hunt — Remastered, Coffee Talk, and The Cosmic Wheel Sisterhood. We matched them by the tags players give Castle in the Sands on Steam (Visual Novel, Pixel Graphics, Story Rich, Fantasy, and Choices Matter): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: Story Rich · Pixel Graphics · Choices Matter

OneShot
Shared: Pixel Graphics · Story Rich · Atmospheric

The Witcher 3: Wild Hunt — Remastered
Shared: Story Rich · Fantasy · Atmospheric

Coffee Talk
Shared: Pixel Graphics · Visual Novel · Story Rich

The Cosmic Wheel Sisterhood
Shared: Visual Novel · Pixel Graphics · Interactive Fiction

Martial Law
Shared: Pixel Graphics · Choices Matter · Story Rich

OMORI
Shared: Story Rich · Pixel Graphics · Multiple Endings

BAD END THEATER
Shared: Visual Novel · Story Rich · Pixel Graphics

Until Then
Shared: Visual Novel · Pixel Graphics · Story Rich

Tiny Bunny
Shared: Visual Novel · Story Rich · Choices Matter

Roadwarden
Shared: Pixel Graphics · Story Rich · Interactive Fiction

The Red Strings Club
Shared: Pixel Graphics · Story Rich · Choices Matter

The Test
Shared: Story Rich · Pixel Graphics · Multiple Endings

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

A Bird Story
Shared: Story Rich · Pixel Graphics · Indie

The Wolf Among Us
Shared: Story Rich · Visual Novel · Choices Matter

Mesmalie
Shared: Visual Novel · Interactive Fiction · Choices Matter

To the Moon
Shared: Story Rich · Pixel Graphics · Interactive Fiction

Detroit: Become Human
Shared: Story Rich · Choices Matter · Multiple Endings

The NOexistenceN of you AND me
Shared: Visual Novel · Story Rich · Multiple Endings

LoveChoice
Shared: Visual Novel · Story Rich · Choices Matter

Suzerain
Shared: Visual Novel · Choices Matter · Story Rich

NEEDY STREAMER OVERLOAD
Shared: Visual Novel · Pixel Graphics · Multiple Endings

Pyre
Shared: Story Rich · Visual Novel · Fantasy