Hero Booster

"Boost hero to Level 10 immediately?"

- Message box when about to purchase Hero Booster

Hero Booster is a premium in BTD6. As an alternative to manual hero leveling using in-game cash, it allows the player to instantly boost their hero up to Level 10. It costs 50 plus 50 per level, so purchasing a Hero Booster on a level 9 hero would cost 100 and so on.

Hero Booster can be useful on heroes with slow XP leveling such as Captain Churchill or in Co-Op Mode where heroes level up more slowly due to split XP per hero. Being a premium and related to powers, the Hero Booster is not available on C.H.I.M.P.S. mode.

Trivia

 * Before Version 19.0, Hero Booster used to cost $1.99 USD or regional equivalent and allowed the hero to instantly boost to Level 20. It was reworked likely to reduce pay-to-win features in the game and encourage more in-game use of the one-off Hero Boost premium without need for spending real-world money.