Join the Gacha Tower Defense experience by ilovemini9999; similarly named Roblox games can use different merge systems.
Read each build before deciding what to do
Random builds produce level 1–3 towers. The level you get is the starting point for your next board decision, rather than a number you can assume before the roll.
- Start with a random tower build and inspect the result.
- Check the level and the tower you received.
- Compare its level with the towers already on the board.
Learn the merge rule without losing the board
The merge requirement is the same tower level, and a merge upgrades to the next level. A low-level tower and a higher-level tower do not meet that matching-level rule.
Before a change, notice which towers are currently dealing with enemies. The fact that a merge is available does not prove it is the best change for the current wave.
- Identify a same-level candidate.
- Watch the current defense before acting.
- After a merge, inspect the changed board rather than assuming the previous coverage remains identical.
Separate the two progression goals
The game describes wave-clear goals in the 25–55 range and an index whose completion unlocks Competition mode. Clearing a run and filling the index are related activities, but they are not the same completion condition.
Start by learning a combination you can understand. Use the index to identify collection gaps after the run instead of guessing which towers remain.
Questions before your next run
What levels can a random build produce?
The game describes random builds at levels 1–3.
Can different tower levels merge?
The described merge rule requires towers at the same level.