Bloons Wiki
Bloons Wiki
For the BATTD item, see Barbed Darts (BATTD).
For the BTD5 upgrade, see Barbed Darts (BTD5).
Sub's darts can pop an additional 3 bloons each.
~ BTD6 Description

Barbed Darts is the first upgrade of Path 2 for the Monkey Sub in Bloons TD 6. It increases pierce of each main dart from 2 to 5. For Airburst Darts, darts still split on impact but each individual airburst dart receives +3 pierce. For Bloontonium Reactors, pierce of the damaging radiation zone increases from 50 to 70.

This upgrade costs $380 on Easy, $450 on Medium, $485 on Hard, and $540 on Impoppable.



Barbed Darts will produce more pierce potential overall compared to adding Twin Guns, but for the same cost it doesn't have as much early-game value in comparison. This is because a majority of the issues in early-game come from the faster bloons rather than grouped bloons. However, this upgrade can come in handy when extra dart pierce is necessary.


  • This upgrade increases pierce, allowing for better popping power. It's usually just a stepping stone to higher upgrades.

Version History[]

Mostly implemented crosspath interactions with non-dart attacks.

  • Buff Heat-Tipped Darts crosspath now gives submerged Bloontonium Reactors with extra pierce.
  • Nerf Pierce bonus for submerged Bloontonium Reactors and Energizers decreased (+20% → additive +30; 84 → 70 for Reactors, and 1200 → 1030 for Energizers)
    • Energizer pierce reduction is undocumented in Ninja Kiwi's Version 23.0 patch notes.


Official artwork[]




  • Barbed Darts currently costs the same as the Twin Guns upgrade.