Big Walk Sand Castle Key Requirements, Red Figurines, and Unlock Steps

The beach-side key sequence near the shore is the first big co-op gate in Big Walk. The puzzle is often called the Sand Castle key by players, but the important part is simple: you need four red figurines from nearby starter puzzles before the large key will come free.

Sand Castle key requirements in Big Walk

The Sand Castle key sequence starts at the shore-side console with four red figurine slots and switches. Before the large key can be released, your group needs to collect one red figurine from each of the four nearby puzzles in the starting area.

Four red figurines for the Sand Castle console

How to get the Sand Castle key in Big Walk

This route takes you from the four starter-area red figurines to the finished key that opens the red drawbridge.

Press the Yellow Crane button

Pick each other up under the yellow crane until someone can hit the button and drop the red figurine.

Coordinate the Telescope and Red Light puzzle

Hold the rusted platform button, use the telescope to check the red light target, and release only after teammates are in position.

Solve the Blue House Symbol puzzle

Put one player inside to call the visible symbol order while outside players place the matching items in that order.

Time the Green Structure levers

Assign players to the green columns and use a shared countdown so each lever or button is activated in sequence.

Insert all four red figurines

Return to the beach console near the Sand Castle area and place the four red figurines into the matching slots while the switches stay active.

Start cutting the large key

Put the released key into the nearby cutter slot and follow the red arrow to the next cutter.

Follow each arrow-marked cutter

Carry the key from slot to slot, inserting it each time until its shape matches the Red Bridge lock.

Use the finished key at the Red Bridge

Insert the shaped key into the red drawbridge lock to lower the bridge and open the path forward.

Pick up the flashlight

Stop just after the drawbridge and grab the flashlight item before continuing.

Activate the radio

Keep going until you find the radio with seven channels, then use it so it is active for your group.

Video help

Yellow Crane red figurine

The Yellow Crane puzzle is close to the starting area and teaches the main physical trick your group will keep using: picking each other up. Have players stack under the crane arm until the top player can reach the button mounted underneath it.

Once the button is pressed correctly, the puzzle releases a red figurine. If the button press is not registering, adjust the stack and have the carrier hold still before the top player uses the button.

Telescope and Red Light red figurine

At the rusted platform, one player needs to press the button that makes the red light shine on the target area. Send one or two teammates toward that lit spot while another player uses the telescope to watch their position.

The telescope player should call when the team is actually in place. Release the button only after that callout, then have the players at the target open the box and take the red figurine.

Blue House Symbol red figurine

The Blue House puzzle works best with split roles. Put one player inside the house to lock or use the door area and view the symbol sequence, while the outside players handle the matching items.

Do not rush the callouts here. The symbols can look similar at a glance, so the inside player should describe each one clearly and in order, then the outside players should place the items exactly as called before pressing the button.

Green Structure Lever red figurine

From the Blue House, head toward the mountains and look for the green column structure. Each column has a lever or button tied to the sequence, and the timing window is tight enough that random activation will waste time.

Put one player at each needed column and use a loud countdown. When everyone moves on the agreed cue, the sequence completes cleanly and releases the next red figurine.

Beach console key release

With the four red figurines collected, return downhill to the beach-side Sand Castle console near the customization structure. Place each figurine into its matching slot, with players keeping the required switches active at the same time.

When the console accepts all four rewards, the mechanism raises and releases the large key. Pick it up, but do not take it straight to the bridge yet.

Arrow-marked key cutters

The large key is unfinished when it first comes out of the Sand Castle console. Insert it into the nearby cutter slot to shave the first part of its shape, then look at the red arrow on the cutter for the next direction.

Repeat that process at each cutter pillar. The arrows form the route, and every slot changes the key a little more, so skipping one will leave the key in the wrong shape for the bridge lock.

Red Bridge unlock rewards

Carry the finished key to the red drawbridge and insert it into the matching lock. The bridge lowers, the Big Walk achievement notification appears with “Lower the drawbridge,” and your group can cross into the next area.

Before wandering off, pick up the flashlight immediately after the bridge. A little farther along the path, you will also find a radio with seven channels; activate it with the use command so it is ready for later exploration.

Common Red Bridge blockers

Most failed attempts come from treating the Sand Castle console like a simple deposit box. It needs the full set of four red figurines, and the required switches must stay active while the items are being inserted.

The other common mistake is carrying the released key straight to the drawbridge. If the key does not fit, go back to the cutter route and follow the red arrows until the shape is finished.

For the co-op timing puzzles, slow down and assign roles before touching anything. One player calling symbols, one player watching through the telescope, or one player counting down at the green columns will save more time than everyone improvising at once.

More game guides

• How to Unlock Red Cave In the Forge Roblox: Location, Requirements, and Guide
• Beast of Reincarnation Red Key Strongbox: Location, Requirements, and Rewards
• Fisch Cathedra Requiei Skin: Requirements, Location, and Unlock Steps