Monkey Knowledge
Big Bloon Sabotage
Big Bloon Sabotage in BTD6: all MOAB-class bloons spawn with 10% less health (bosses excluded). Huge for freeplay; when to turn it off.
All MOAB-Class Bloons spawn in a partially damaged state.
Daily challenges
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Guide
Big Bloon Sabotage is the final knowledge in the Military tree. Every MOAB-class bloon spawns with 10% less health, including MOAB-class children of other blimps. Boss Bloons are not affected. You need 14 Knowledge Points in the Military tree, both Sub Admiral and Master Defender, and a one-time 1,000 Monkey Money. The cheapest route takes 15 Military points and 3,500 Monkey Money in total.
How it changes the game
Base health values before freeplay scaling:
The cut applies to every blimp layer separately, so a BFB spawns with 630 health and the MOABs inside it come out with 180 each. Fortified blimps get the same 10% off their fortified health. That makes the total savings much bigger than 10% of the outer layer suggests.
- Rounds 40 to 100: every blimp pops a little sooner, which smooths out the rounds where most leaks happen.
- Freeplay: blimp health scales up heavily after round 80, and a percentage reduction scales with it. For deep freeplay, this knowledge is close to mandatory.
- Instakills: effects that kill blimps up to a health limit reach further. For example, path 1 Beast Handlers can instantly kill MOAB-class bloons on later freeplay rounds than they otherwise could.
Is it worth it?
Priority: must-have. It is one of the strongest late-game knowledges in BTD6, and it helps every game with blimps.
There is one important exception. In Boss Events and Boss Rush, players who plan to build a high-degree Paragon often turn Big Bloon Sabotage off. Paragon degree depends partly on the total pops your towers collect, and blimps with less health give fewer pops. Since version 57, you can disable single knowledges in the Monkey Knowledge menu, so you no longer need to respec for this.
Where it works
Big Bloon Sabotage works wherever Monkey Knowledge is enabled, including freeplay, Impoppable, Military Only and Double HP MOABs. It is disabled in CHIMPS and in challenges that switch knowledge off, so blimp damage checks in CHIMPS must be planned against full health.
Frequently asked questions
What does Big Bloon Sabotage do?
All MOAB-class bloons spawn with 10% less health. Boss Bloons are excluded.
Does Big Bloon Sabotage affect blimp children?
Yes. Each layer, such as the MOABs inside a BFB, also has 10% less health.
Should I turn off Big Bloon Sabotage?
Only when farming pops for a high Paragon degree, mainly in Boss Events and Boss Rush.
How many points does Big Bloon Sabotage need?
At least 15 Military points in total, plus 3,500 Monkey Money across the deeper rows.
Does it work on bosses?
No. Boss Bloons keep their full health.