Boss Battles

Boss Battles are a new feature added in Bloons Tower Defense 6. Each track has its own boss. There are usually some rounds prior to the official boss battle. Fighting boss battles is unlocked at Rank 30; challenging the boss on a certain difficulty requires having beaten it normally on that difficulty prior. As a general rule, bosses are toned down in difficulty from Medium to Easy, made slightly harder in Hard, made significantly more challenging in Insane, and made flat-out unfair in Impoppable. The pre-boss rounds typically remain unchanged between Medium and Easy, are made slightly tougher in Hard, made unusually difficult in Insane, and made just plain mean in Impoppable. Often, beating the boss in Easy, Medium, and Hard unlocks something, and beating it on Insane and Impoppable increase its power or add benefits. Bosses can also be fought in Deflation Mode and Apopalypse Mode, and may act differently in those cases. Toggling the boss switch then entering Sandbox Mode will let you click a button (without a hotkey) to summon the boss. The button is disabled until the boss is defeated. Fighting bosses on Sandbox Mode gives no reward. Beating a boss on a mode replaces the medal with a trophy of the same material.