Sandcastle Guides Hub
Learn building, tides, and shore exploration for the demo and beyond.
Start here
Sandcastle is a cozy physics sandbox from Bubblebird Studio, published by Future Friends Games. The August 2026 Steam demo lets you sculpt wet sand, engineer moats, and watch gentle tides test your castles on Base and Barrier beaches. The full game adds more layouts later and remains to be announced—these guides focus on systems you can practice today.
If you have never loaded the demo, begin with How to Play for session flow and tool discovery. Before your first high tide, read Protect From the Tide so you understand where waves pool and how erosion chooses weak points.
Building and defense guides
Structural guides help you translate real beach logic into the simulation. Build Strong Walls covers compaction, buttresses, and thickness rules that reduce slumping. Carve Moats explains channel depth, spillover, and when moats hurt more than they help on Barrier Beach.
Building Tips collects quality-of-life habits: staging embellishments, pacing work between tide cycles, and using Digging Tools versus Carving Tools for different shapes. Decorate Sandcastle Builds walks driftwood, pebbles, shells, and seaweed placement after tide tests.
Sandcastle on Steam Deck covers mouse-only cozy pacing, portable session length, and performance caution without inventing benchmark numbers.
Collectibles and exploration
Sandcastle scatters starfish and shore treasures along the tideline. Find Collectibles maps efficient walking routes and respawn behavior at a high level without spoiling every secret. Pair it with Starfish Collectibles and Shore Treasures for unlock and decoration detail.
Tools and physics cross-links
Guides assume you understand core simulation language. When a wall collapses unexpectedly, jump to Sand Physics, Moisture and Stability, and Tide Erosion on the Build Hub. For a printable defense workflow, open the Tide Defense Checklist under Tools Hub.
Demo context
Install steps live on Demo Download. Compare scope with Demo vs Full Game before hunting beaches that are not in the demo yet. Input help is centralized in Controls—we reference in-game prompts instead of unverified key lists.
Suggested learning order
- How to Play
- Protect From the Tide
- Build Strong Walls
- Carve Moats
- Find Collectibles
- Building Tips
- Decorate Sandcastle Builds
- Sandcastle on Steam Deck
Return to this hub after patches—Demo Launch Update tracks post-release changes that may adjust tides or tool behavior.
Common mistakes these guides prevent
Players often carve battlements before a packed core exists, dig ring moats without spillways, or decorate caps that never survived low tide. Each guide page targets one failure mode so you can fix it without restarting the whole castle. Cross-linking is intentional: moat advice assumes you already understand Moisture and Stability.
Speed versus calm play
Nothing rewards rushing. If you only have twenty minutes, build smaller on Base Beach and finish with one reliable wall plus a starfish lap instead of a half-finished megaproject on Barrier Beach. Building Tips expands pacing ideas for lunch-break sessions versus long photography nights.
Frequently Asked Questions
Quick answers drawn from the same systems covered above.
Do these guides cover the full game?
They describe core systems shown in the demo and Steam materials. Additional beaches arrive with the full release TBA.
Which guide helps with tides first?
Start with Protect From the Tide, then use the Tide Defense Checklist tool page for a step-by-step pass.
Are there combat or enemy guides?
No. Sandcastle is non-violent sandbox play without combat systems.
Do guides mention exact keybinds?
No. Controls vary by device; check in-game prompts and the Controls page for input options.
Where do starfish fit in?
Find Collectibles introduces routes; the Starfish Collectibles page explains unlocks and beach customization.