Hero Mode is a part of BTDX. Hero Mode has Five Stages, a which are, Hold Em' Outs on special Hero-Only tracks. You must face a Boss-Blimp never before seen each time, and do a ridiculous amount of rounds. Enough doseage to make you go 100% insane! Not in Insane Difficulty however, and has many Conditions to play it, and tweaks for its gameplay.
Unlocked by playing and beating Apopalypse-Or not? Special Mission, and Beating Abyss on Easy, Medium, and Hard.
Must be Rank 80+
NO: Agents (Execpt Spies, Bloonberry Bushes, and Terrain.) ,Super Monkeys, Spectre's, Spike Factories, MOAB assassins, and nothing can stun non-zebra/ceramic bloons.
No MOAB-class bloons EXCEPT boss-blimps.
50 rounds on a secret track.
BOSS: AMOAB. ( ATTACK MASSIVE ORNARY BLIMP.)
65 Rounds on a secret Monkey Village track.
BOSS:aMOAB (assault MASSIVE ORNARY BLIMP.)
75 Rounds on TOTAL WARZONE track.
95 rounds on Epic Heights track.
Boss: CCBoTD (Chaotic Cursed Blimp of Total Destruction) appears to bomb temple.
125 rounds on Demented Monkey Lane
Boss: MMCBoT (Monstrous Mechanical Cursed Blimp of Monkey Terrorization.)
Reward: Hero! Medal. 10k Monkey Money. Bloon Mode.