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Bloons Wiki

Blasts deeply through Bloons and layers over a huge area, plus powerful Burny Stuff damage.
~ BTD6 description

The Biggest One is the fifth upgrade of Path 1 for the Mortar Monkey in Bloons TD 6. It makes devastatingly large explosions, each popping up to 200 bloons and inflicting 25 damage onto any affected bloon, 50 on Ceramics and MOAB-class, and 21 for Ceramics struck by the outer region of the shockwave explosion. Blast radius increases by +25% on top of The Big One (75 blast radius for main explosion, 37.5 for stunwave, 112.5 for damage wave), creating among the biggest non-ability explosions possible in the entire game.

When paired with Burny Stuff, the napalm from the explosions will now deal 25 damage every 0.625 seconds for 1.875 seconds, inflicting a total of 75 damage. Adding Extra Burny Stuff decreases the cooldown of the burn ticks to 0.375 seconds, for up to 125 damage for the duration of the burn.

It costs $23,800 on Easy, $28,000 on Medium, $30,240 on Hard, and $33,600 on Impoppable.



The Biggest One upgrades the mortar cannon to a black-and-green color scheme, fitting the gloomy perception that its deadly radiation depicts. The mortar cannon is colored entirely in the grey-to-black color scheme, it retains the two thin green bands, and the radioactive symbols are extruded outwards from the barrel. Like its previous upgrade, radioactive symbols appear on both sides. The operator's full bodysuit is patterned black-and-grey, his suit's stripe being black, and retains green lenses for his eyes. He continues to wear the same gloves as Shell Shock. In the official upgrade portrait, the operator appears to be planning to slam dunk a glowing radioactive shell into a really large barrel, leaning his right arm on the edge of the barrel, and peering into the barrel at the green glow inside.

Full Popology[]



Damage Types[]



Updated as of Version 30.1
Easy Medium Hard Impoppable
Upgrade Cost (5-x-x) $23,800 $28,000 $30,240 $33,600
Total Cost (5-0-0) $TBA $38,650 $41,740 $TBA
Total Cost (5-1-0) $TBA $38,950 $TBA $TBA
Total Cost (5-2-0) $TBA $39,450 $TBA $TBA
Total Cost (5-0-1) $TBA $38,850 $TBA $TBA
Total Cost (5-0-2) $TBA $39,350 $TBA $TBA



The Biggest One serves a similar role to The Bloon Solver, blasting superceramics while dealing fair damage to MOABs. It has the advantage of a global range, which can be moved around for optimal effectiveness and can also be further enhanced by buffs such as Berserker Brew, Overclock, and Striker Jones. It also comes with a few minor disadvantages, namely the price and the fact that it is less likely to catch leaking Ceramic Bloons. In general though, it remains a solid choice when it comes to popping Super Ceramics.

Crosspathing greatly impacts the role of The Biggest One as a specializer at widespread high damage. As both Path 2 and Path 3 upgrades are roughly equal in power when paired with The Biggest One, the desired crosspath depends on your required needs. Increasing attack speed can make micromanaging the tower's targeting less of hassle and hit its intended mark faster. Adding Burny Stuff allows it to deal large damage-over-time to all affected bloons, which can make it more viable when heavy micro-management is not required but damage maximization desirable. It is worth a note that the nature of The Biggest One is to catch Super Ceramics efficiently, and without the faster firing path it may require more support against Super Ceramics.


  • The desired crosspath for The Biggest One depends on its intended purpose for the defense. Crosspathing with Path 2 increases its attack speed, making it easier to micromanage at different spots and hit its intended mark faster, which is much stronger against Super Ceramics in particular. Crosspathing with Path 3 maximizes damage by adding a secondary burn damage-over-time, which is stronger against MOAB-class bloons.
    • Increased Accuracy by itself is not very useful considering The Biggest One already produces enormously huge explosions. Keep this in mind if you choose to go for 5-0-2 crosspathing.
    • The 5-2-0 crosspath is more reliable at demolishing Super Ceramics, because it can stun Super Ceramics more often while dealing quite effective damage output. On the other hand, 5-0-2 is good for chipping down the health of MOAB-class bloons because adding the high damage-over-time effect actually deals more DPS overall if not for time delay.
    • With the 30.0 rework to Shell Shock's interaction with Burny Stuff, 5-0-2 has risen to prominence over 5-2-0 for not just the significantly higher MOAB damage potential, but also the ability to destroy a Super Ceramic after only 1 tick of burn damage, which occurs faster than 5-2-0's second shot by a significant margin. This is even true of Fortified Super Ceramics, seeing as 5-2-0 requires 3 shots to destroy them entirely, and thus over 3 seconds, while 5-0-2 requires only one shot and its resulting burn, requiring less than 2 seconds.
  • In the absence of the speed path, add a Super Ceramic supporter such as Downdraft to blow back any stray Super Ceramics and bring them closer to the Mortar's massive blasts. This is especially handy with the 5-0-2 crosspath.
  • The Biggest One is improved heavily by attack speed bonuses such as Jungle Drums Villages and Striker Jones Level 4+ will hugely benefit the overall DPS by a significant amount.
    • As it already has a large damage and pierce, as well as full-map range, Berserker Brew is slightly less effective on The Biggest One. However, it is still viable to place this type of Alchemist buff on The Biggest One for the bonus attack speed.
  • To maximize The Biggest One's damage and stunning potential, set the targeting on a loop of the track.
    • If there are no loops available the best space to target it would be where it covers lots of track.

Version History[]

Balance Changes[]

The Biggest One was one of the first Tier 5 upgrades to receive massive buffs in a single update. The 3x Ceramic+ damage buff in Version 9.0 made it a lot more reliable at popping Super Ceramics, and even at handling weaker MOAB-class. Despite a small overall nerf to its extra damage in later updates, it has become a viable option at combatting large groups of Super Ceramics. Since The Biggest One had fallen out of popular use after getting nerfed to 40 damage, it was buffed in Version 30.0 to deal 50 damage, a middle-ground from its formerly dominant damage amounts.

  • Buff Damage increased to 20 (from 10).
  • Buff Blast radius (correctly) increased from The Big One size.
  • Buff Blast radius significantly increased even further.
  • Buff Cost of The Biggest One decreased ($30,000 → $24,000).
  • Buff The Biggest One deals 3x more damage on Ceramics and above.
  • Nerf The Biggest One costs more ($24,000 → $28,000).
  • Change Now has new explosion art.
  • Buff The Biggest One without MIB can now (correctly) deal damage to DDTs.
  • Nerf The Biggest One bonus damage to ceramics and higher reduced (+40 → +20).
  • Buff The Biggest One larger shockwave radius now deals extra damage to ceramics (+0 → +20).
  • Nerf The Biggest One larger shockwave radius extra ceramic damage decreased (+20 to +10).
  • Nerf Explosion random deviation radius increased (18 → 30).
  • Buff Attack speed without Path 2 upgrades increased (2.2s → 2.0s).
  • Buff Attack speed with Faster Reload increased (1.54s → 1.5s).
  • Nerf Attack speed with Rapid Reload decreased (1.07s → 1.08s).
  • Buff 5-0-2 The Biggest One's Burny Stuff effect deals more damage (1 → 25).
  • Buff Reverted random deviation radius change.
Bottom path Mortar burns have been reworked to burn faster and last longer at all upgrades; the Extra Burny Stuff MK has been tweaked in order to keep it's [sic] benefit the same comparatively to the new & improved base values.
~ Ninja Kiwi, referring to Burny Stuff
  • Buff 5-0-2 indirectly affected by Burny Stuff rework, increasing tick rate and total damage of the improved burn damage
Mortar top path feels too weak for the lead up to the Tier 5, so it along with the T5 have had some general number increases. Additionally the 302 crosspath has failed to ever see a great deal of use compared to much faster firing, to make it easier to to [sic] use up power from the DoT this path will now burn through faster
~ Ninja Kiwi
  • Buff The Biggest One main explosion damage increased (20 → 25)
  • Buff The Biggest One main explosion damage versus Ceramics+ increased (40 → 50)
  • Buff The Biggest One outer shockwave damage versus Ceramics increased (10 → 20)
  • Buff 5-0-2 The Biggest One napalm burns twice as fast but also lasts twice as short
  • Buff [undocumented] 5-0-2 The Biggest One napalm with Extra Burny Stuff burns faster (1.0s --> 0.375s)
  • Buff 5-0-2 The Biggest One can now apply napalm to visible DDTs without needing a MIB

Bug Fixes and General Changes[]

  • Change Changed the number "Smashes through 10 layers of Bloon over a huge area." to "Smashes through 20 layers of Bloon over a huge area."
    • In Version 7.0, the description was not changed to reflect the new damage amount. This has since been corrected in Version 8.0.
  • Change 5xx The Biggest One description updated "as it deals much more damage now".
    • Before Version 20.0, the description for The Biggest One was "Smashes through 20 layers of Bloon over a huge area." but has since been changed because of how outdated and questionable it was to describe its massive explosive damage. Changed to "Smashes deeply through Bloons and layers over a huge area."
  • Change Description changed, reflecting above buff.
    • Changed from "Smashes deeply through Bloons and layers over a huge area." to "Blasts deeply through Bloons and layers over a huge area, plus powerful Burny Stuff damage."
  • Buff 502 Mortar now applies burn to DDTs without MIB so long as they circumvent the camo


Official artwork[]



  • Despite The Biggest One's enormous blast radius, it still has a smaller blast radius than Super Mines, despite being "The Biggest One". This is still the case despite receiving various updates buffing The Biggest One's blast radius, though the explosion radius actually did affect a wider radius in Version 7.0. However, The Biggest One hadn't quite displayed a visual increase in blast radius size until Version 9.0, subsequently adding entirely new explosion assets for The Biggest One.
    • Another interesting note is that The Biggest One's explosions were smaller than the current The Big One's explosions when it was first released.
  • The Biggest One had been considered the most buffed tower in BTD6 history within the timespan of a few updates, starting off as an extremely inefficient tower that could only explode 10 layers per shot with a relatively small explosion radius, rising up to Version 9.0-10.1 as a top-tier tower that was capable of wiping out an entire Round 98 with ease.[1]
    • By single updates alone, however, Prince of Darkness is considered the most buffed upgrade in BTD6 history, in Version 21.0.
    • In terms of entire BTD6 history, however, Wizard Lord Phoenix is considered the most buffed upgrade in BTD6 history, initially starting off as an extremely expensive ability with the power of only a few phoenixes but later gaining a much stronger ability plus a permanent normal phoenix and major stat boosts for its alternate attacks.
  • The extra damage to Ceramics via the outer shockwave explosion can be compared to how ceramic materials are more susceptible to thermal shock compared to other groups of materials (i.e. compared to polymers, metals, and composites). Because all explosions produce a sudden increase in energy to the surroundings including thermal energy, ceramic materials such as Ceramic Bloons are more likely to fail via thermal shock compared to other materials. Therefore, it would make sense for Ceramic Bloons to be dealt more damage from the outer region of the shockwave explosion.
  • In the game's files, the upgrade icon for The Biggest One is named "TheBIggestOneUpgradeIcon.png" with a capital I.
  • The stun can affect bloons that weren't damaged due to the pierce cap, however the stun still has its own pierce cap.
  • The Biggest One is also one of the 3 "nuclear" towers in the game, the other 2 being the Energizer and the Tsar Bomba.