There are currently 13 heroes in BTD6, with new ones occasionally being added in new updates. The following tables show the round on which a Hero will reach Level 20, if placed on round 1, and if no levels are bought.
For most purposes, the amount of money needed for an upgrade is the amount of XP required. Heroes require a set amount of XP per level (see BTD6 Heroes XP). The highest level a hero can reach is 20. The first ability is unlocked at level 3, and the second ability is unlocked at level 10 for both Ezili and Adora, they gain their second ability at level 7 and third at level 10. Spending money to level your hero also increases sell price.Įach hero has multiple abilities (all have two with the exception of Ezili and Adora, who both have three) that can be used to the player's advantage.
The more XP a hero already has, the lower the amount of cash required to upgrade the hero to the next level. However, they can also be upgraded instantly for a sum of in-game cash. XP gain can be increased or decreased by outside factors, such as Energizer or Monkey Knowledge. Unlike normal towers, only one hero can be placed on the track for each game and automatically gains XP needed to upgrade itself, making them more useful the earlier they are placed. Quincy gradually leveling up after Round 2 on Monkey Meadow