Materials
Heavy pieces dropped into a late-game wall. Confirm costs, drop rates, and unlocks in the live Stop The Tsunami! experience.
Player wiki for Stop The Tsunami! on Roblox: sand walls, trenches, machines, materials, co-op roles, and the code box.
Boulders are dropped into the late defense. The experience lists them with gravel, clay, and concrete for walls that face a monster wave.
| Fact | Value |
|---|---|
| Hub | Materials |
Drop them on the full beach as a late-game material.
Place them in a wall that already has a continuous line. A boulder does not plug a gap by itself.
Claim the Daily Spin and daily rewards, then build a continuous packed sand wall with a trench before you press START ROUND. Spend the coins from waves you hold on the next tool you can actually use.
No active or expired code strings are confirmed for this game. Check the session after updates, and do not enter strings copied from unverified lists.
The official game description says joining the Beach Club group grants a free Rewind. The exact group page is not named in that description, so use the join prompt inside the game.