Sandcastle Starfish Collectibles
Unlock beach customization by collecting starfish along the shore.
What starfish do
Starfish are Sandcastle’s primary progression collectible. Steam store text states you collect starfish to unlock customization: sand type, beach layout, size, and related beach character options. They connect exploration to replayability without introducing combat or scores.
The demo includes starfish on Base Beach and Barrier Beach. The full game TBA should extend hunting to layouts like Lagoon Beach and Atoll Beach.
How to find starfish
Walk the upper tideline after foam retreats—see Find Collectibles for lap patterns. Starfish often appear where shallow runoff pools before you moat those areas (Carve Moats). On Barrier, check lee pockets behind default berms.
Some starfish may sit semi-buried; use gentle Digging Tools passes rather than deep moat cuts that permanently alter spawn geography in your session.
Unlock menu expectations
Exact UI labels appear in-game and may evolve during early access-style updates. Expect buckets such as:
- Sand type — affects compaction feel per Sand Physics
- Beach layout — switches among demo and future shores (Beaches Hub)
- Size — adjusts playable canvas per marketing bullets
Starfish do not replace Digging Tools or Carving Tools—they gate options, not basic verbs.
Strategy for demo players
Pick up every starfish you see even mid-build. Unlock breadth early so you can compare Base versus Barrier without replaying tutorials. If a starfish sits near an active construction zone, pause building and collect before tides shift sand.
Interaction with tides
Starfish pickups should persist as unlock progress within your save. Loose starfish models on the ground may relocate after surf—do not treat them as permanent landmarks across days.
What starfish do not do
They are not structural reinforcements, currency for tools, or multiplayer tokens. Decorating with Shore Treasures remains separate.
Full game and save questions
Bubblebird Studio has not fully documented demo-to-full save transfer at wiki writing time. Track Demo vs Full Game and Updates Hub for announcements.
Related guides
After unlocking new layouts, revisit Protect From the Tide and the Tide Defense Checklist—customization changes fetch geometry.
Collection etiquette for screenshots
Pick up starfish before photographing wide shots if you want clean sand textures; leave them for scale reference if you want proof of exploration.
Menu exploration after unlocks
When new sand types appear, rebuild a coupon wall from Moisture and Stability to feel differences before committing to a megaproject. Cosmetic sand may compact subtly differently even under the same rules.
Unlock pacing without FOMO
Starfish are plentiful enough for relaxed play but not so rare that you must grind with spreadsheets. If unlock menus feel slow, alternate one build session with one lap session rather than marathon hunting.
Customization experiments
When switching beach layouts after unlocks, rebuild a tiny test castle before moving megastructures. Layout changes alter fetch even when sand type stays constant.
Menu literacy
Read each unlock line carefully—some options change layout size dramatically, invalidating moats tuned for smaller footprints. Re-run Carve Moats planning after size changes.
Speedrun culture
Speedrunning starfish routes is optional community fun, not developer-endorsed competition. Play at beach pace if that stresses you.
Starfish as progression punctuation
Each starfish can mark a chapter break: “unlock sand type, rebuild test wall, continue.” Chapter pacing prevents rushing into Barrier before Base skills solidify.
Closing synthesis
Starfish turn exploration into customization without combat pressure—ideal progression for a single-player sandbox awaiting its full beach roster.
Final notes
Return to related hub pages when patches land—mechanics stay stable but tide timing or tool unlock order may shift in Steam news. Cross-link siblings in this category for moats, collectibles, and physics vocabulary. Pair reading with one in-game tide cycle so abstract advice becomes muscle memory on wet sand.
Frequently Asked Questions
Quick answers drawn from the same systems covered above.
Are starfish required for Barrier Beach?
Demo access includes Base and Barrier. Starfish unlock customization options beyond defaults per store text.
How many starfish exist?
Total counts are not published. Hunt along each layout's tideline and revisit after tides.
Do starfish respawn?
Sessions continue to wash items in. Treat unpicked spawns as revisitable after tide cycles.
Can starfish unlock tools?
Store materials tie starfish to beach customization, not tool gates.
Do starfish appear on Steam Deck?
Yes wherever the demo runs. Use in-game prompts for comfortable camera heights when spotting small objects.