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Bloons Wiki
For the Premium Upgrade, see Big Bloon Sabotage.
Sabotage Supply Lines Ability: Sabotage the bloons supply lines for 15 seconds. During the sabotage, all new bloons are crippled to half speed.
~ BTD5 description

Sabotage Supply Lines is the final upgrade of the Path 2 for the Ninja Monkey. This upgrade allows the Ninja Monkey access to the Sabotage Supply Lines Ability, which slows all of the bloons spawned in the next 15 seconds to half speed. The sabotage ability has a 60 second cooldown, giving it a total ability uptime of 25%. This is very useful for Freeplay Mode, as blimps get faster, as well as Advanced, Expert and Extreme Tracks with short paths.

In Bloons Monkey City, this upgrade requires the Guerilla Training Camp.


Ninja Monkey has a red belt just like a Bloonjitsu and has four green eye slits. Also, their fingers are in the same position as a Bloonjitsu, making the same "shush" position.



In BTD5 and BMC, it is very helpful to be able to have room to purchase the Sabotage Supply Lines upgrade for the ability in case of any potential overwhelming rushes. At the small price of $6650 for a 0/4 Ninja Saboteur, as well as a $1330 loss if one does buying and reselling, the player can highly reduce the potential overflow significantly. In BTD5 and BMC, it is more worthy of saving the ability, as it is much easier to gain cash in these games than in BTDB due to gaining cash from popping bloons rather than a per-6-second timer.

In BTDB, it is a lot more expensive to sell and rebuy the ability. So it is wiser to only use Sabotage Supply Lines with a sell-and-rebuy at a huge sent rush, unless it's very late-game (such as Round 40+), in which it would be more efficient to just let the Sabotage Supply Lines ability(s) cool down before using the ability again.


  • In the Flash versions, be sure to activate the ability before the round starts; doing so applies the sabotage to all newer bloons at the start of the round.

Differences Between BTD5 Flash and BTD5 Mobile[]

NERF After the Sabotage Supply Lines ability wears off, the affected bloons will recover and once again move at full speed.

Update History (Bloons TD Battles Mobile)[]

Initial Release

BUFF Sabotage Supply Lines slows all bloons on screen as opposed to just the newly spawned ones.


NERF Sabotage Supply Lines price increased ($1800 → $4000).


NERF Sabotage Supply Lines price increased ($4000 → $5000).



  • Pink Bloons affected by Sabotage Supply Lines Ability move at the same speed as Green Bloons.
  • This is the third cheapest Special Ability in BTD5 by the cost of the final upgrade alone, only to be behind Absolute Zero and Blade Maelstrom, but the shadow double ability costs Monkey Dollar3250 in total which is debatably cheaper.
  • This is one of two Special Abilities the Ninja Monkey can use, the second is Shadow Double Ability which can be obtained through purchasing the third (fourth on mobile) upgrade of the Ninja Academy and activating it.
  • It can become very useful when you're planning to go to rounds 86+ because it can slow down the M.O.A.B. Class bloons, as they move faster in higher rounds.
  • This is the only ability without an animation (and no sound effects either).
  • In an update of Bloons TD Battles, the ability has been weakened. Sabotage Supply Lines now slows all bloons in screen for 10 seconds. Outside of Battles it will behave normal.
  • The goggles worn by the Ninja Monkey might be a possible refernce to the Splinter Cell games.
  • In Bloons Monkey City, the special building required for this upgrade (the Guerilla Tactics Training Camp) has to be placed on a Jungle Terrain tile. However, it can also be placed on Sticky Sap Plant tiles, too
  • When upgraded to this upgrade, the Ninja Monkey becomes a Ninja Saboteur.
  • The cooldown is one minute.
  • This upgrade does not increase the attack speed of the Ninja Monkey.