Bloons Wiki
Bloons Wiki

For the BTD5 counterpart, see The Big One (BTD5).
Devastating explosions pop 5 layers of bloon, plus increases Burny Stuff damage further.
~ BTD6 description

The Big One is the fourth upgrade of Path 1 for the Mortar Monkey in BTD6. It increases the blast radius by +50% (40 to 60 for main explosion, 20 to 30 and 60 to 90 for the secondary explosions), damage of the main explosions from 2 to 5, pierce of the main explosion from 45 to 85. Unlike BTD5, The Big One comes with secondary explosions (from Shell Shock that stun affected bloons for 0.5s, or extra damage if further from the explosion). Both the main explosions and the secondary shockwave explosions can pop Black Bloons regardless of upgrades. With Burny Stuff, the damage per tick increases from 2 to 3, but it still burns bloons at a rate of every 1.25s for 3.75 seconds.

It costs $6800 on Easy, $8000 on Medium, $8640 on Hard, and $9600 on Impoppable.



  • Easy (4-0-0): $6,800 (Total: $9,350)
  • Medium (4-0-0): $8,000 (Total: $11,000)
  • Hard (4-0-0): $8,640 (Total: $11,880)
  • Impoppable (4-0-0): $9,600 (Total: $13,200)


The Big One is a rather expensive tower, but it is a good option for dealing big damage to grouped bloons, as well as a fair amount of damage to early MOABs. It is mostly used on maps where unlimited-range crowd control is required, or if planning to purchase The Biggest One later on in the game. Compared to Artillery Battery, which is better against MOAB-class, The Big One is far superior against grouped regular bloons.


  • The Big One is a great option for midgame due to its cheap price. It is mainly specialised against bloons, and tends to be good on Rounds like 63, 76 and 78.
    • Due to its bloon specialisation it is highly recommended to bring other DPS with decent MOAB popping power such as Arcane Spike or Quincy.
  • During Round 81+, when superceramics begin to spawn, it stops being a solo DPS tower. While retaining passable damage its role shifts towards that of stalling superceramics with its stun.
  • Infinite range, being able to negate Line of Sight, and manoeuvrability are some notable benefits of using The Big One. It benefits especially on maps with large rounded bends such as Moon Landing or Spillway.
  • With the Mortar Monkey reworks on Version 21.0 and 28.0, 4-2-0 will have an easier time hitting bloons, as well as applying stuns with more frequency; however, 4-0-2 will have a great dps advantage when against ceramics, or a dense clump of bloons.
  • The Big One, as well as Shell Shock and The Biggest One, cannot stun Black or Zebra bloons regardless of whether it can pop them or not. It can still stun the children if the bloon was popped by the main blast.
  • The stun can affect bloons that weren't damaged due to the main blast's pierce cap of 85; however, the shockwave still has its own pierce cap of 45.

Version History[]

The Big One has overall been buffed, attributed mostly to the price decrease and increased blast radius.

  • Buff The Big One cost reduced ($10,000 → $8,000).
  • Buff The Big One blast radius increased.
  • Buff The Big One will now (correctly) damage DDTs when given camo detection.
  • 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 4-0-2 The Biggest One's Burny Stuff effect deals more damage (1 → 3).
  • Buff Reverted random deviation radius change.
  • Buff 4-0-2 indirectly affected by Burny Stuff rework, increasing tick rate and total damage of the improved burn damage

Description changes[]

  • Change Changed from "Devastating explosions pop 5 layers of bloon." to "Devastating explosions pop 5 layers of bloon, plus increases Burny Stuff damage further."


Official artwork[]


  • The artwork for The Big One does not feature the radioactive symbol on the thick mortar barrel, but the in-game model does.
  • In the game's files, the upgrade icon for The Biggest One is named "TheBIgOneUpgradeIcon.png" with a capital l - possibly a typo.
  • The upgrade icon for The Big One shows destroyed parts of a red, blue, green and zebra bloon, and fortified bands flying off from the explosion. not only is both the pink and white/black layer missing, but fortified zebra bloons both do not exist in btd6, and would not be able to be popped by a single explosion from The Big One, as it deals only 5 damage. The Big One is also not able to fully pop even a regular zebra bloon, as that would require dealing 7 damage, which The Big One has never been able to do.