Start Game
Place gems, build a maze and stop the creeps from reaching the gem castle. Collect recipes to combine legendary towers like Silver, Malachite and Uranium-235!
Power = floor(total damage / 10) + sum(special towers: 500 x tier multiplier (Secret 40 / Top 15 / Advanced 6 / Intermediate 2.5 / Basic 1) x level multiplier) + 10000 per clear ·View the full formula
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Data is stored locally. Save actions moved to the in-game panel (💾 in the top bar: Save now / New save (XX diamonds)).
How do I place gems on specific cells?
Place gems only during the build phase: hold the mouse, drag the ghost stone onto the target cell and release (on mobile, hold and drag). Up to 5 stones per round, numbered badges show the order. Do not seal the route to the castle - invalid spots will fail to place.
How does the two-finger reposition gesture work? (mobile/tablet build aiming)
While long-pressing to aim a build, the helper gem sits at the upper right of your finger (15° direction × 40px, so it is not covered). For precise edge placement, use two-finger reposition to freely adjust the offset between your finger and the helper gem:
① Long press with one finger: hold the map for about 0.3s until the helper gem appears, then slide to aim (the gem stays at the upper right of your finger);
② Keep holding and add a second finger: the helper gem freezes in place; now sliding both fingers (you may even cover the gem) only changes the finger-to-gem offset - the gem stays where you froze it;
③ Lift one finger: single-finger aiming resumes from the remaining finger, gem unmoved and offset kept; keep sliding to fine tune;
④ Release the last finger: the gem is placed on the cell under the helper gem (what you see is what you get).
Conflict rules: before a long-press build starts, two-finger slide = pan the map and pinch = zoom; once the helper gem is up, two-finger slide switches to offset adjusting (no pan, no zoom) without interrupting each other; normal map gestures return afterwards.
How do I combine gems?
During the pick phase, tap the gems of this round to open the panel: Keep builds a gem tower; Keep at lower tier keeps it one tier below (leaving room to combine); with 2 or more gems of the same type and tier you can merge 2 into 1 (+1 tier), with 4 or more you can merge 4 into 1 (+2 tiers) (kills reset after merging).
How do I build a maze quickly?
A maze = use stones as blockers to lengthen the path: at the start lay 2-3 segments of snake walls toward the checkpoints, then extend the same corridor with each round of 5 stones - the longer creeps detour, the more output your towers get. Stones placed by mistake can be demolished during the build/pick phase to free cells.
How do I use Priority Watch?
Tap any gem or tower on the field to open its panel, then flip the ☆ Watch switch on a tower/slab entry in the recipe list (it turns into ★, set as many as you like). After all 5 gems are placed each round, the whole field is scanned automatically: gems whose recipes can be met at current tier, one tier down or by merging up will glow with a rose halo; open the panel to see in the pinned Priority Watch area whether to merge or downgrade (with a direct combine button when the tier fits and materials are ready).
How do I open the Priority Watch quick panel?
First mark at least one tower/slab as ☆ Watch in the recipe list; the pinned ★ Priority Watch area then appears at the top of the recipe area. Tap the 📌 pin button there (Pin the Priority Watch quick button) - the quick button snaps to the right edge; tap it anytime to open the Priority Watch quick panel. Tap 📌 again to unpin.
Which towers/slabs have the highest priority?
Tiers from high to low: Treasure > Top > Advanced > Mid > Basic. For Priority Watch, set your final goals first (like Uranium-235, Malachite and other top/treasure towers plus advanced slabs), then fill in the material towers in between - the recipe list is sorted from low to high tier, so marking them one by one means you never miss a material gem.
How do I demolish stones? Can towers/slabs be removed?
Tap a stone, then the ⛏ Demolish button (costs gold, build/pick phase only). Towers and slabs cannot be demolished - they are your power core; misplaced ones can only be moved.
How do I move towers/slabs? How many times?
Tap a tower/slab, choose ⇄ Move, then tap a new cell on the map (tier/ability/kills kept). Normal towers/slabs move free the first time, then each move costs diamonds (💎 Move); advanced slabs can move up to 2 times (1 free + 1 with diamonds).
How do I get diamonds?
① Sign-up bonus (50💎 by default); ② Achievement rewards (19 achievements covering first win, waves, kills, career and more, +5~30💎 each); ③ Event rewards; ④ Purchase. Diamond uses: undo builds, 💎 moves and creating saves (diamond saves can be shared to Highlights).