Bloons Wiki
Bloons Wiki

Spillway is an Advanced Map in Bloons TD 6. It was released on September 17th 2019, on Version 12.0, along with Workshop and the Engineer Monkey.


Spillway is a toxic waste dump with four bloon paths, each coming from the four corners. Bloons enter around the toxic pool and then exit on the opposite path that they entered from.

In the middle of the toxic waste pool, there is a metal barrel where only one small footprint tower (Dart Monkey, Tack Shooter, Ice Monkey, Glue Gunner, Sniper Monkey, Ninja Monkey, and Alchemist) can be placed on.

On the outside, there is concrete floor with a bunch of contaminated gas masks, bottles of toxic fluid, and a contaminated lab coat.

There are four inflatable walls on each side of the toxic waste pool that can be removed for $2000 each. When removed, a visual Engineer Monkey will blowtorch out the edges of the inflatable wall, and the inflatable wall falls into the toxic waste.


Monkey Money Rewards
Btd6monkeymoney.png Easy[?] Medium[?] Hard[?] Impoppable[?]
First Time $225
Completed $45


Main article: Spillway/Strategies

Version History[]

Spillway has received multiple bugs throughout the game's updates due to the complexity of the barrel's footprint. Overall, Spillway has been buffed in difficulty (i.e. nerfed in easiness).

Balance changes here are listed in terms of favoring the player.


Nerf Up to four small footprint towers can fit onto the central barrel instead of one tower (bug)


Buff Bugfix of above glitch


Nerf Small footprint towers can no longer fit on the central barrel (bug)

Buff Bugfix of above glitch



  • This is the first map to have obstacles that cost more than $1500 per obstacle.
  • Due to an error when adding the map decorations for the Independence Day Collection Event on version 18.1, the map instantly caused the game to crash upon loading while the event was active. As a result, it was also disabled on co-op, and attempting to start a co-op game on Spillway will result in an error.
    • This was fixed as of Version 19.0. Interestingly enough, there were two days left for the event.
  • It is possible to let a 0-2-0 Tack Shooter attack from the barrel if it is placed pixel-perfectly at the lowest point of the barrel.
  • The hazmat masks appear to be the mask the Bloon Dissolver is wearing, and in the bottom appears to be the glue gun from the Bloon Solver.