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Steam Demo Live · Fan Wiki

Sandcastle Wiki

Physics, tools, beaches, and demo tips for Bubblebird Studio's cozy sandbox.

Unofficial Sandcastle wiki for demo download steps, tide defense, sand physics, tools, beaches, and collectible unlock paths.

Open Steam page Start with How to Play
Demo
Live on Steam Aug 6, 2026
2
Demo beach layouts
10
Full-game beaches teased
Solo
Calm single-player sandbox
Explore the wiki

Hubs organised around what players search before and after the Steam demo.

Demo

Demo Hub

Sandcastle demo on Steam: Base and Barrier beaches, sand physics, tides, and shore treasures. Full game release date TBA.

Open page Guides

Guides Hub

Sandcastle guides for new players: how to play, tide defense, strong walls, moats, collectibles, and building tips for the Steam demo.

Open page Tools

Tools Hub

Sandcastle tools hub: digging, carving, moat work, and the tide defense checklist for shaping wet sand on Base and Barrier beaches.

Open page Beaches

Beaches Hub

Sandcastle beaches hub: Base and Barrier in the demo, plus lagoon, island, delta, and atoll layouts planned for the full game release.

Open page Collectibles

Collectibles Hub

Sandcastle collectibles hub: starfish unlock beach customization, shore treasures like shells and driftwood, and tideline hunting routes.

Open page Build

Build Hub

Sandcastle build systems hub: sand physics, moisture stability, tide erosion, and links to guides for walls, moats, and demo beaches.

Open page Controls

Controls and Input

Sandcastle controls overview: mouse-only play, Steam Deck support, in-game prompts, camera and tool input without unverified keybind lists.

Open page Review

Sandcastle Review

Sandcastle demo review: cozy sand physics, Base and Barrier beaches, tide erosion, starfish unlocks, single-player sandbox, full game TBA.

Open page Updates

Updates Hub

Sandcastle updates hub: demo launch news, Steam patch notes, full game TBA timeline, and links to official Discord and developer channels.

Open page Links

Official Links

Official Sandcastle links: Steam full game and demo pages, sandcastlegame.com, Discord community, and wiki hubs for guides and updates.

Open page
Featured guides
Build

Sand Physics

Sandcastle sand physics explained: moisture, compaction, pressure slump, water interaction, and how demo beaches test your castle designs.

Open page Collectibles

Starfish Collectibles

Sandcastle starfish collectibles unlock sand type, beach layout, and size customization. Where to find them in the demo and full game plans.

Open page Demo

Demo Download

Download the Sandcastle demo on Steam for Windows, macOS, Linux, and Steam Deck. Free install, single-player sandbox, no multiplayer.

Open page Guides

How to Play Sandcastle

Learn Sandcastle basics: gather wet sand, shape walls, carve moats, survive tides, and collect starfish in the free Steam demo.

Open page Guides

Protect From the Tide

Defend Sandcastle builds from tides: moat depth, wall thickness, damp packing, barrier beach exposure, and erosion hotspots to watch.

Open page Build

Daylight Cycle and Reactive Water

Sandcastle daylight cycle and reactive water: time-of-day lighting, tide interplay, erosion readability, and demo beach sessions.

Open page Tools

Tide Defense Checklist

Interactive Sandcastle tide defense checklist: berm audit, spillways, wall thickness, moat exits, and corner reinforcement before high tide.

Open page Guides

Decorate Sandcastle Builds

Decorate Sandcastle builds with driftwood, pebbles, shells, and seaweed. Embellishment guide after tide tests on demo and future beaches.

Open page
Steam demo desk

What shipped on August 6, how to install it, and how it compares to the full vision.

Sand and tide physics

Moisture, pressure, erosion, and the habits that keep towers standing.

Beaches and layouts

Demo shores plus the lagoon, island, delta, and atoll layouts teased for the full game.

Collectibles, creatures, unlocks

Starfish unlocks, shore treasures, decoration, and announced beach creatures.

Tools, Deck, and checklists

Digging, foundation, carving, Steam Deck tips, and the tide-defense checklist.

Quick start on the beach

A calm first session that still teaches the physics that matter.

  1. 1

    Install the Steam demo

    Follow the Sandcastle demo download guide, then load Base or Barrier and learn the mouse-first tool flow without racing a clock.

  2. 2

    Feel moisture before height

    Read the sand physics and moisture pages, then pack damp foundations so early walls do not slump under their own weight.

  3. 3

    Engineer for the tide

    Use the protect-from-tide guide and the interactive checklist to dig moats, overflow channels, and thicker seaward faces.

  4. 4

    Scavenge and unlock

    Hunt starfish and shore treasures, then compare demo beaches with the full-game layout preview so you know what wishlist progress unlocks later.

  5. 5

    Refine controls and tools

    Open Controls plus the digging and carving tool pages when you want cleaner battlements and less accidental collapse.

FAQ

Wiki FAQ

Quick answers drawn from the same systems covered above.

Is Sandcastle Wiki official?

No. This is an unofficial fan resource. For patches, demos, and store truth, always confirm on the Steam page and Bubblebird Studio channels.

Is the full game released?

Not yet. The full Sandcastle release date remains to be announced. A free Steam demo went live on August 6, 2026 so players can sample the sand and water physics.

Which languages are supported?

This wiki supports: English, Français, Deutsch, Español. Configure locales in site.meta.json and run npm run generate:i18n.

Where should absolute beginners start?

Begin with the How to Play guide, then skim Controls and the Demo download page before experimenting with taller towers.

Does Sandcastle include multiplayer?

Current Steam listing information points to a single-player experience. Plan sessions as calm solo building rather than competitive modes.