The siege is coming

GEM KEEPER

Build · Defend · Hold

100Levels
10Worlds
35Materials

Coming soon to Android & iOS · Free · No ads

Gem Keeper gameplay — a block shelter built around a glowing gem

How it plays

Every round is a
two-act challenge

You are the keeper. The gem is yours to defend — and the boulders don't care how pretty your build is.

1

BUILD

Drag blocks from your tray. Stack them, wedge them, layer them — any way you can to shield the gem. Blocks are limited, so every placement counts.

2

BRING IT!

Hit the button and the barrage begins. Watch your structure absorb impact after impact — cracking, shifting, bending under the assault.

3

HOLD

If the gem survives, you advance to a harder siege. If it shatters, you rebuild and go again. No timers. No energy bars. Just one more try.

The journey

10 worlds.
10 gems to keep.

Each realm holds a precious gem — and a harder siege waiting for it. From the quiet Plains to the shattered Ruins.

Your arsenal

35 materials,
each with its own physics

Rubber deflects. Sandbags dead-stop. Barrels explode. Springs launch boulders back where they came from. Mastering them all is the key to a perfect defense.

The keeper's shop

Earn coins.
Power up your defense.

Skilled defense earns coins — spend them before the next siege. No purchases, no pay-to-win. Everything is earned in the game.

3 ◆🧱

+Blocks

Extra material in your tray — more to build with next round.

3 ◆🔧

Repair

Restore your structure to full strength mid-siege.

4 ◆🛢️

Barrel

Explodes on contact, destroying every boulder nearby.

5 ◆⏭️

Skip

Removes three boulders from the incoming barrage.

5 ◆💪

Reinforce

Every block you place gets double durability.

8 ◆🛡️

Shield

Absorbs one lethal hit and deflects the boulder away.

Mastery

Survive. Then perfect it.

Every level scores your defense. Three stars means the gem was never even touched.

Survivor

The gem made it through the siege. That's all that matters… for now.

Efficient

Survived with blocks to spare. A lean build is a smart build.

Untouchable

Not a single boulder reached the gem. The mark of a true keeper.

The gem is yours
to defend.

100 hand-crafted levels. Fully offline. Progress saved on your device — no accounts, no tracking, no ads.

✔ Free ✔ No ads ✔ No pay-to-win ✔ Works offline

Coming soon to Android & iOS