Marble Sort Level 308 Walkthrough & Solution

Level 308 Board Overview: Split-Board Key Trap

The verified walkthrough identifies the opening board as Split-Board Key Trap. The first confirmed moves are: Leave the outside edges completely alone and start by choosing the green box that rests against the divider’s right face, guiding it into the live green receiver in lane two. Then: Pick the brown box against the divider’s left face and steer it cleanly into the live brown receiver in lane three. The next safe order is recorded below so the belt does not fill with bait.

The Trap in Marble Sort Level 308

• Opening bait: Let the freshly uncovered purple box (on the right, above the old green spot) fall into the live purple receiver in lane one.
• Board order: Take the dark grey box (on the left, above the old brown spot) so it drops into the dark grey receiver that just turned live in lane three.
• Belt discipline: Use only the first verified clears here; do not spend belt space on a color without an active receiver.

Marble Sort Level 308 Step-by-Step Walkthrough

Opening: follow the safe first clears

1. Leave the outside edges completely alone and start by choosing the green box that rests against the divider’s right face, guiding it into the live green receiver in lane two.
2. Pick the brown box against the divider’s left face and steer it cleanly into the live brown receiver in lane three.
3. Let the freshly uncovered purple box (on the right, above the old green spot) fall into the live purple receiver in lane one.

Midgame: open the next receiver path

After the opening clears, let the next exposed groups move only when their receiver is ready.

4. Take the dark grey box (on the left, above the old brown spot) so it drops into the dark grey receiver that just turned live in lane three.
5. Collect the key fixed to the dark grey box on the board’s right, then choose the light blue box down on the lower-left to flip the pink box that holds the second key.
6. Advance toward the grey key boxes up near the center-top, letting each key touch the belt to count, and skip the orange on the right since no orange receiver is live yet.

Cleanup: finish the remaining sequence

The final phase follows the remaining source order. Pause whenever the belt starts to fill.

7. Clear the blue boxes on the left to crack the neighboring yellow Iced Box, then empty the unlocked dark grey receiver at once the moment the lower lock snaps.
8. Open the hidden boxes one at a time to read each color, fire the two top pipes only when a pair of empty receivers can take the flood, then sort the spill and the leftover icy edges to close out.

Level 308 Tips Recap

• Let the freshly uncovered purple box (on the right, above the old green spot) fall into the live purple receiver in lane one.
• Advance toward the grey key boxes up near the center-top, letting each key touch the belt to count, and skip the orange on the right since no orange receiver is live yet.
• Open the hidden boxes one at a time to read each color, fire the two top pipes only when a pair of empty receivers can take the flood, then sort the spill and the leftover icy edges to close out.