The Big One (BTD5)

"Devastatingly large explosions, and each pops though 5 layers of bloon"

- BTD5 description

The Big One is the final upgrade of the path 1 for the Mortar Tower in BTD5. It makes devastatingly large explosions, each popping up to 100 bloons and tearing through 5 layers of Bloons, including Black Bloons. In BTD5, it costs $10,000 on Medium.

Tips

 * If the player buys this upgrade with Burny Stuff for both Mortar Towers on the Direct Assault mission just before round 23, they can pass the mission without spending a single dollar in Monkey Money.
 * This upgrade is not very effective against MOAB-Class Bloons, as it is lacking in single-target damage despite its high pierce.

BTD Battles

 * On BTD Battles, this can be used for defending a strong bloon rush, although other cheaper strategies exist.
 * Note that by itself this tower cannot pop Camo Bloons, so use this with a x/3 Mortar Tower if the opponent sends Camos.

Update History (Bloons TD Battles Mobile)
The Big One price decreased ($10000 → $6000).
 * 4.1
 * 4.3.1

The Big One price increased ($6000 → $7500).

Trivia

 * The Big One replicates the Davy Crockett Weapon System.
 * Initially, in the Mobile version, the description erroneously stated, "Devastating explosions each pop 3 layers of bloon." (even though it still popped 5 layers). This was corrected in an update to 5 layers. This error still exists on the Steam version.
 * These are useful for making the game lag less because of how large the explosions are, with the huge range along with the fact that they take out more bloons instantly.
 * If the player adjusts the aim for a Mortar Tower with The Big One on the center of Mount Magma, or the center of 3 Times Around's circle, or the center of Country Road's circle, or the center of Snowflake's snowflake, it will cover the entire circular/pentagonal center.
 * This is the only upgrade that increases the pierce of Mortars. Every other Mortar upgrade has a pierce of 40, while The Big One has a pierce of 100 (in addition to popping 5 layers, meaning the Big One can pop up to 3,100 bloons in a single shot (if it hits 100 Ceramics with 1 HP left).
 * The monkey next to The Big One seems to wear the same clothes as a Glue Hose Glue Gunner, but the clothes are protecting the monkey from radioactive mortar shells and not from glue.
 * The upgrade picture suggests that The Big One cannot safely be touched by the monkeys (even with gloves) without the help of tongs to insert the mortar. However the monkey is not using them in-game, so the upgrade picture could be purely for emphasis to show how dangerous The Big One is.
 * The explosion sizes are of the same of the missiles fired by a Temple of the Monkey God, which are also as large as the radius of an unupgraded Super Monkey.
 * The Big One is one of the few explosive towers that can pop Black and Zebra Bloons without support from an MIB, the others being Bloon Impact, Hydra Rocket Pods, Spiked Mines, and Flash Bomb. This is because they use Bloontonium.
 * The name may have come from the NASCAR term The Big One, meaning a huge crash.
 * It takes 40 explosions to pop a MOAB's outer layer using this upgrade.
 * In BTD5 Flash, the Mortar makes a louder blast sound upon being upgraded to The Big One.