Marble Sort Level 84 Walkthrough Solution | Marble Sort 84

Marble Sort Level 84 Guide: The Lock and Key Mystery Trap

Marble Sort Level 84 throws a massive visual roadblock at you the moment the board loads. You look at the lower left of the upper play area and see a thick iron chain. A heavy padlock secures this chain directly over three massive 9-marble clusters. This instantly dictates your entire strategy. You cannot simply sort colors at your own pace. You have to hunt for the key.

The dominant colors on this board are Red, Blue, Yellow, and Lime Green, but you will quickly notice how badly they are blocked. The top layer of your bottom receptacles requires Red, Yellow, Lime Green, and Blue. The problem is that half of these colors are either buried under gray Mystery Boxes or trapped behind that massive chain. If you tap the wrong arrows early just to clear space, your Conveyor Belt will jam before the padlock ever opens.

The Locked Chain pattern in Marble Sort Level 84

Every single tap matters on this specific board layout. You have to understand exactly where the colors live before you make your first move.

Look at the left side of the Top Tray. It features a dense, layered grid of arrow blocks. The top row gives you access to Cyan, Red, and Blue downward arrows. Row two holds Brown and White arrows. Row three provides Pink, Cyan, and Green. These are your only predictable opening moves on the left side.

Directly beneath those arrows sits the trap. Two solid rows of gray ? Mystery Boxes span the middle of the left grid. You have no idea what colors they hold until the block in front of them drops. Below those mystery blocks is the defining obstacle of Marble Sort Level 84. A massive chain and Lock and Key mechanism seals off three huge 9-marble boxes: a Red box, a White box, and another Red box. You cannot touch these until the lock is broken.

Now scan the right side of the Top Tray. A vertical wall completely separates this right column from the main left grid. At the very top right sits a gold Key block. It is wedged beside more ? blocks. Below the key area, you have individual arrow blocks for Lime Green, Pink, Blue, Cyan, Green, and another Pink. Finally, at the very bottom right, there are two exposed 9-marble boxes: one Yellow and one Lime Green.

The lower Boxes—the receptacles you must fill to clear the level—dictate your required order of play. The board drops them in four columns. Column one holds Red, Light Pink, Lime Green, and Red. Column two stacks Yellow, Yellow, Pink, and Blue. Column three hides Lime Green, Blue, Red, and Yellow. Column four contains Blue, White, Pink, and White.

The top active row of these Boxes currently demands Red, Yellow, Lime Green, and Blue. The Red and Blue are easily accessible from the top-left arrows. The Lime Green is ready on the right side. Yellow is the bait. There is a massive Yellow 9-marble box on the bottom right. Tapping it now will flood your Conveyor Belt because the Yellow bottom Box only needs a few marbles to clear. The excess will sit on the belt, eating up crucial space while you try to dig through the Mystery Boxes to find the key.

Marble Sort Level 84 Step-by-Step Walkthrough

Your entire opening phase is a rescue mission. You must ignore the locked massive boxes on the bottom left and focus entirely on unearthing the gold key on the top right.

Grabbing the Key in Marble Sort Level 84

Do not tap the large 9-marble clusters yet. You need to carve a path through the top arrows to activate the bottom receptacles.

1. Tap the Red arrow on the top left of the Top Tray. This sends marbles down to start filling the Red bottom Box in the first column.
2. Tap the Blue arrow on the top right of the left-side grid. This targets the Blue bottom Box in the fourth column.
3. Move to the right side of the vertical divider. Tap the Lime Green arrow to feed the Lime Green bottom Box in the third column.
4. Stop and look at your Conveyor Belt. You need space before you touch the gray blocks.
5. Tap the ? Mystery Boxes carefully. Only hit a mystery block if you have at least three open slots on your belt. You need to clear the layer immediately beneath the top arrows.
6. Target the blocks directly under or adjacent to the gold Key on the top right. Your sole objective is to drop the key down so it clears.
7. Ignore the large Yellow 9-marble box on the lower right. It is completely bait at this stage. If a mystery box reveals a Yellow marble, let that fill the active Yellow bottom Box instead.

Surviving the Chain Release in Marble Sort Level 84

The board drastically changes the second the key clears. The padlock breaks. The chain shatters. Suddenly, you have access to a massive payload of Red and White marbles on the bottom left.

8. Do not instantly tap the newly unlocked Red or White 9-marble boxes. Look at your lower Boxes first.
9. The second layer of receptacles requires Light Pink, Yellow, Blue, and White.
10. If the White bottom Box in column four is not fully exposed and active, do not touch the locked White 9-marble cluster. Nine white marbles will spill onto the Conveyor Belt. With no active box to catch them, they will permanently jam your game.
11. Clear the Yellow Box in the second column by tapping the 9-marble Yellow box on the lower right of the Top Tray. Because the second layer requires Yellow, this is now a safe move.
12. Use the remaining arrows on the right side (Pink, Blue, Cyan, Green) to feed the second layer of bottom Boxes.
13. Once the White receptacle is active in column four, tap the unlocked White 9-marble box on the bottom left. It will cleanly drop and instantly clear the receptacle.

Managing the 9-Marble Drops in Marble Sort Level 84

The endgame is all about matching the huge remaining clusters to the deepest layers of the bottom receptacles.

14. The third row of bottom Boxes requires Lime Green, Red, and Pink.
15. Now tap the unlocked Red 9-marble boxes on the bottom left. The active Red receptacles in columns one and three will catch the massive drop.
16. Tap the Lime Green 9-marble box on the bottom right to clear the Lime Green receptacle in column three.
17. Clear out any remaining Pink arrows from the top right column.
18. Finish the final row of bottom Boxes (Red, Blue, Yellow, White) using whatever marbles were exposed behind the final Mystery Boxes. Keep your belt clean, only dropping exactly what the active bottom layer requests.