Level 3 Sauda with a Hero Booster confirmation messagebox

The Hero Booster is a game mechanic in Bloons TD 6 that allows the player to spend Monkey Money to instantly level their Hero up to level 10. The cost depends on the Hero's current level, lowering at higher levels, and the player cannot purchase it if the Hero is already at level 10 or greater.

Hero Boosters are disabled in modes and challenge rule sets where Powers are disabled, including CHIMPS, Sandbox, Rogue Legends, Boss Rush, and competitive events.

Costs

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Level Cost Cost/XP ratio[fn 1]
1   500 86.56
2   475 90.74
3   450 94.76
4   425 97.98
5   400 99.45
6   350 104.29
7   275 113.89
8   200 115
9   100 136.2

Update history

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  • No longer an in-app purchase, instead costing Monkey Money depending on the Hero's level
  • Now capped at level 10 instead of fully upgrading the Hero

Footnotes

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  1. Assuming the Hero has a ×1 XP curve and no excess XP towards the next level.
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