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Bloons Wiki
Hurls a huge spiked ball that pops everything it touches. Can upgrade range, speed and multi-shot
~ Description

The Spike-o-pult is a tower introduced in Bloons TD 3 that launches a spiked ball with 1 damage and 6 pierce every 1.65 seconds. It is best used against large, clustered groups of low-ranking bloons. Upgrades increase its range, attack rate, pierce, and projectile size.

In later BTD games, the Spike-o-pult appears as an upgrade for the Dart Monkey.

Tower Costs[]

Game Easy Medium Hard
Bloons TD 3 $510 $610 $650
Bloons TD 3 Mobile $460 $540 $565


Path 1[]

Longer Range BTD3
Longer Range
COST: $215 / $255 / $270
Description: Increases maximum range of Spike-o-pult.
Effect: ~17.9% range increase.
Juggernaut BTD3
COST: $700 / $840 / $890
Description: Spike-o-pult balls roll much further.
Effect: +14 (20 total) pierce. Extra ceramic damage(?)

Path 2[]

Faster Reload BTD3
Faster Reload
COST: $215 / $255 / $270
Description: Can shoot faster than normal.
Effect: 82% (1.35s) reload speed.
Multi Shot BTD3
Multi Shot
COST: $490 / $585 / $620
Description: Shoots three spikey balls at once!
Effect: Increases projectile size (does not result in additional projectiles).



  • The Longer Range upgrade does not change the tower's appearance.
  • The Multi Shot and Juggernaut upgrades also reappear in later BTD games as upgrades for the Dart Monkey (with Multi Shot becoming Triple Shot in BTD4 and Triple Darts in BTD5 and later).