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Blasts deeply through Bloons and layers over a huge area, plus powerful Burny Stuff damage.
~ In-game 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, 45 on Ceramics and MOAB-class, and 21 for Ceramics struck by the outer region of the shockwave explosion. Blast radius increases on top of The Big One (74 blast radius for main explosion, 37 for stunwave, 111 for damage wave), creating among the biggest non-ability explosions possible in the entire game. In addition, each stunwave now stuns MOABs for 0.5s, stuns BFBs and visible DDTs for 0.3s, and stuns ZOMGs for 0.1s. Its primary explosions can't affect Black properties but its shockwaves can.

When paired with Burny Stuff, the napalm from the explosions will now deal 50 damage every 0.625 seconds for 1.875 seconds, inflicting a total of 150 damage. Adding Extra Burny Stuff decreases the cooldown of the burn ticks to 0.375 seconds, for up to 250 damage for the duration of the burn.

This upgrade costs $30,600 on Easy, $36,000 on Medium, $38,880 on Hard, and $43,200 on Impoppable.



The biggest one overview

The Biggest One stunning Fortified MOABs with its massive explosions

The Biggest One upgrades the mortar cannon to a black-and-green color scheme. 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 jumpsuit is patterned black-and-grey, its suit's stripe being black, and retains green lenses for its eyes. It 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 its right arm on the edge of the barrel, and peering into the barrel at the green glow inside.

The Biggest One, as implied by its name, creates massive explosions, enough to pack immense widespread damage and stun MOAB-class Bloons. It also further improves the damage of the Burny Stuff effect, should it be crosspathed with Burny Stuff.

Targeting Priorities[]

Mortar Monkey has only one target priority, "Set Target". This allows the Mortar Monkey to land shells within anywhere inside the target reticle. Tapping on the "Set Target" button prompts the player to change the target position of where the Mortar Monkey will land its shells. By default, once the Mortar Monkey is bought, the Mortar Monkey's target reticle is placed near the start of the first bloon track.

If Striker Jones's Level 7+ Target Focus ability is activated, all Mortar Monkeys are automatically set to Follow Touch / Follow Mouse temporarily, unless manually re-targeted via Set Target, and snap back to their old Set Target option once the ability is finished.

Full Popology[]

Updated as of Version 41.2
Base stats
  • Explosion:
    • Lobbed projectile, explosion type, targets at a custom-aimed location with deviation of 18, 0.5s deployment cooldown, 2.0s attack cooldown, 74 blast radius, 25 damage, +20 Ceramic damage, +20 MOAB-class damage, 200 pierce. Upon expiry, create Stunwave and Shockwave.
  • Stunwave:
    • 37 blast radius, 200 pierce, stuns bloons for 0.75s, MOAB-class bloons get stunned for shorter duration (MOAB: 0.5s, BFB and DDT: 0.3s, ZOMG: 0.1s), does not affect Black or Zebra bloons.
  • Shockwave:
    • Burst, normal type, 111 blast radius, 200 pierce, 2 bloon-unpenetrating damage plus +20 Ceramic damage, cannot affect bloons within half of the radius.
Crosspathing interactions
  • 5-1-0: Explosion attack cooldown reduced from 2.0s to 1.5s
  • 5-2-0: Explosion attack cooldown reduced from 1.5s to 1.08s.
  • 5-0-1: Target deviation of Explosion reduced from 18 to 8.
  • 5-0-2: Explosion inflicts a Burn status effect that deals 50 damage per 0.625s for up to 1.875s.
Monkey Knowledge Interactions

Attack Interactions[]

See also: Attack Interactions/Bloons TD 6/Military
Updated as of Version 36.2
Base attack(s)
  • Explosion:
    • Explosion Type (pops White, Purple, Lead, Frozen) Explosion
    • Area of Effect Area of Effect
    • Full Map Range (unspecified description of how the tower can attack beyond basic range) Full Range
    • Erratic Movement (small projectile deviation from reticle) Erratic Movement
    • Extra damage to all bloon types (25) Extra Damage (25)
    • Extra damage versus Ceramics (+25) Extra Damage to Ceramics (+25)
    • Extra damage versus MOAB-class Bloons (+25) Extra Damage to Blimps (+25)
  • Shockwave (stun):
    • Normal Type (pops Black, White, Purple, Lead, Frozen) Normal
    • Burst (source: Explosion) Burst (source: Explosion)
    • Area of Effect Area of Effect
    • Erratic Movement (small projectile deviation from reticle) Erratic Movement
    • No damage to all bloon types (unspecified damage) No Damage
    • Stun (standard bloons, 0 Stun (duration: 0.75s)
  • Shockwave (damage):
    • Normal Type (pops Black, White, Purple, Lead, Frozen) Normal
    • Burst (source: Explosion) Burst (source: Explosion)
    • Area of Effect Area of Effect
    • Erratic Movement (small projectile deviation from reticle) Erratic Movement
    • Extra damage to all bloon types (2) Extra Damage (2)
    • Extra damage versus Ceramics (+20) Extra Damage to Ceramics (+20)
    • Cannot Penetrate Multiple Layers (cannot penetrate through multiple layers) Cannot Penetrate Multiple Layers


Updated as of Version 43.0. Listed prices exclude external buffs, any sacrifices, and Monkey Knowledge.
[Module | Data] Purchase Sell
Costs Easy Medium Hard Impoppable Easy Medium Hard Impoppable
Upgrade (5-X-X) $30,600 $36,000 $38,880 $43,200 -
Total (5-0-0) $38,375 $45,150 $48,760 $54,180 $26,863 $31,605 $34,132 $37,926
Crosspath (5-1-0) $38,630 $45,450 $49,085 $54,540 $27,041 $31,815 $34,360 $38,178
Crosspath (5-2-0) $39,055 $45,950 $49,625 $55,140 $27,339 $32,165 $34,738 $38,598
Crosspath (5-0-1) $38,545 $45,350 $48,975 $54,420 $26,982 $31,745 $34,283 $38,094
Crosspath (5-0-2) $38,970 $45,850 $49,515 $55,020 $27,279 $32,095 $34,661 $38,514

This upgrade's prices (or included crosspath's prices) are affected by the following MK: MilitaryConscriptionIcon Military Conscription, AdvancedLogisticsIcon Advanced Logistics, BetterSellDealsIcon Better Sell Deals



The Biggest One serves a similar role to The Bloon Solver, blasting superceramics while dealing fair damage and crowd control to MOABs. However with Version 33.0, it has gained a price increase along with an added stun against blimps to distinguish it from Bloon Solver's superceramic focus, by now serving as support against MOAB-class bloons. 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. The desired crosspath depends on the primary purpose of The Biggest One in a defense, with Path 2 crosspath offering general damage and higher stun rates, and Path 3 crosspath focusing on intense burst damage. Increasing attack speed can make micromanaging the tower's targeting less of hassle and hit its intended mark faster, in addition to maximised rate of stunning blimps. 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. Note that the nature of The Biggest One is to offer crowd control against Super Ceramics and large groups of MOAB-class bloons, and without the faster firing path it may require more support to counter 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 and MOAB-class Bloons in particular. Crosspathing with Path 3 maximizes damage by adding a secondary burn damage-over-time, which is far superior at damage than Path 2 if not for the slow rate of fire.
    • Increased Accuracy by itself is not very useful considering The Biggest One already produces enormously huge explosions. Keep this in mind if going for 5-0-2 crosspathing.
    • The 5-2-0 crosspath is more reliable at demolishing Super Ceramics and MOAB-class Bloons, because it can stun them 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.
      • After the 33.0 changes, Biggest One now offers a stun against MOABs, providing bonus support against MOAB-class bloons and synergizing better with 5-2-0 for more frequent stuns.
    • 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 capability 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.
  • It takes a minimum of Striker Level 4+ (0.90x cooldown), Jungle Drums (0.85x cooldown), and Overclock (0.60x cooldown) to allow a 5-2-0 Biggest One to permastun MOABs.

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 45 damage, a middle-ground from its formerly dominant damage amounts.

Since The Biggest One and The Bloon Solver had held similar roles, damaging and slowing Super Ceramics as well as inflicting decent MOAB-class damage but with the advantage of global range for the former, The Biggest One had outclassed The Bloon Solver for a long time. The Biggest One had received a rework in Version 33.0 that allows it to stun MOAB-class but cost more, which makes it more distinct as an all-around global crowd control, at the exchange of being a less efficient a bloon controller on Race Events and similar. The values were modified in Version 34.0 and 37.0 to further push the overall power of 5-0-2 and 5-2-0 crosspaths to their more expensive roles.

  • 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).
Mortar's Faster Reload feels like a 'required' as a crosspath with Burny Stuff never scaling well on any path but its own. We like choices not requirements so to counter this we have made Burny Stuff scale with top-path damage & shifted a small amount of the speed from Faster Reload onto the base mortar and reduced base accuracy considerably.
~ Ninja Kiwi
  • 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 versus Ceramics+ increased (40 → 45)
  • BUFF The Biggest One outer shockwave bonus 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
It has been hard for The Bloon Solver & The Biggest One to exist so close in the same price range when they fill the same role but with The Biggest One being simply better and more versatile, so we have ramped The Biggest One to fill a better role but for a higher cost. [...]
~ Ninja Kiwi
  • NERF The Biggest One price increased from $28,000 → $36,000
  • BUFF The Biggest One can now stun MOAB-Class Bloons at a reduced rate
    • MOAB are stunned for 0.3s, BFB/DDT are stunned for 0.2s, ZOMG are stunned for 0.1s
The recent Mortar 5xx rework significantly devalued 502 crosspath, undermining the work we previously put into trying to balance that choice, [...]
~ Ninja Kiwi
  • BUFF 5-0-2 The Biggest One DoT damage increased 25 → 45
As the Rapid Reload crosspath has actually fallen behind in value compared to Burny Stuff for top path Mortars we want to try a slight stun duration increase as this buffs the base path with a larger benefit to Rapid Reload mortars as a stalling option. [...]
~ Ninja Kiwi
  • BUFF The Biggest One stun duration to MOAB-Class Bloons increased:
    • BUFF MOAB: 0.3s → 0.5s
    • BUFF BFB and DDT: 0.2s → 0.3s
    • Change ZOMG: remains at 0.1s
  • BUFF The Biggest One stun versus non-blimps increased (0.5s → 0.75s)
Such a heavily explosive based tower upgrade to ignore its explosive weakness on every path didn't sit right, some of the Normal damage type on top path is now trading in to make it stronger in other ways. [...]
~ Ninja Kiwi
  • BUFF The Biggest One shockwave damage increased from 1 to 2
  • NERF The Biggest One main center explosion damage type changed from Normal to Explosion. Does not affect secondary explosions.
  • BUFF 5-0-2 The Biggest One's Burny Stuff damage increased from 45 to 50

Bug Fixes and General Changes[]

  • Change Description changed from "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 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."

Extra Notes (Version History)[]

  • In the Version 33.0 reworks, The Biggest One's MOAB-class stun appears to be adapted from a balance change in BTDB2. In turn, this is possibly also inspired by a bug in Version 8.0 where Striker Jones's black-popping upgrade would cause all Mortars to stun MOAB-class bloons if given Shell Shock or above.


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 had not 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 were not 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.