BUILD. COMPARE. MERGE WITH A PLAN.
Read the board before the next wave.
Work with the towers you roll, identify same-level merge candidates, and keep the defense functioning while you pursue the index.
How Gacha Tower Defense works
Gacha Tower Defense starts towers at random levels from 1 to 3. Towers of the same level merge to the next level. Runs ask you to clear 25–55 waves with tower combinations, while collecting every index unlocks Competition mode.
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A CLEAR NEXT STEP
Choose your next task
Learn the rule, inspect the merge, then choose a wave or collection goal.
Gacha Tower Defense: understand builds, levels and merges
Learn the random starting levels, merge rule and the difference between clearing waves and collecting the index.
Read the guide 02 / Read the boardSame-level merges: inspect the board before combining towers
Identify same-level towers and check wave pressure before changing your Gacha Tower Defense board.
Read the guide 03 / Plan the next runWave preparation and the Competition index goal
Plan a wave attempt, review a failed run and work toward the index required for Competition mode.
Read the guide