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Spikes last much longer and can carry over one round.
~ In-game description

Long Life Spikes is the 3rd upgrade of Path 3 for the Spike Factory in Bloons TD 6. The spikes from this upgrade can last in between rounds (2 rounds or 140 seconds, whichever comes first). This allows spikes to carry over another round from the round they were created. Spike piles from this Spike Factory resemble Caltrops thrown from a Ninja Monkey, except the spike piles from Long Life Spikes are blue instead of grey (or hot yellow with 2-0-3).

It costs $1,190 on Easy, $1,400 on Medium, $1,510 on Hard, and $1,680 on Impoppable.



Long Life Spikes adds an additional gear to the Spike Factory, paints the entire body blue, save the feet, which remain yellow, and the space reserved for the now yellow spike logo, (and opposite it) which is painted a lighter blue. The main port for the spikes now also bears black-and-yellow hazard stripes.

This tower's spike piles now resemble Caltrops, however they are blue instead of grey.

Crosspathing with path 1 adds a red, then black segmented rim around the spike port, and with White Hot Spikes in particular the spikes glow orange, or even white, with the heat.

Crosspathing with path 2 adds two vents above the left and right side gears, and paints the feet purple, then extends those vents higher.


Long Life Spikes increases lifespan of spikes to 140 seconds and carries over up to one round. In effect, spikes last up to 2 rounds or 140 seconds, whichever comes first. The spike carryover benefit has no effect on Apopalypse, but has effect on Boss Bloon Events. Long Life Spikes also has the benefits of Smart Spikes.

Targeting Priorities[]

Long Life Spikes defaults on Normal targeting priority, which dispenses the spikes onto nearby bloon track in a semi-sporadical behavior. Because it already has Smart Spikes, it will also receive Close, Far, and Smart.

  • Normal: Targets spike piles in a somewhat sporadical way, spreading spikes as evenly as possible within its range.
  • Close: Targets the closest region(s) of track within range.
  • Far: Targets the furthest region(s) of track within range.
  • Smart: Prioritizes the track with the Bloon the farthest through it, then targets the spot on that track closest to the exit.


Tower Prices[]

Updated as of Version 29.4
Easy Medium Hard Impoppable
Upgrade Cost (x-x-3) $1,190 $1,400 $1,510 $1,680
Total Cost (0-0-3) $TBA $TBA $3,180 $TBA
Total Cost (1-0-3) $TBA $TBA $TBA $TBA
Total Cost (2-0-3) $TBA $TBA $TBA $TBA
Total Cost (0-1-3) $TBA $TBA $TBA $TBA
Total Cost (0-2-3) $TBA $TBA $4,695 $TBA


Long Life Spikes is a rather expensive but versatile upgrade once purchased. By allowing each spike pile to last between rounds, it is possible to stall rounds in order to stockpile many spike piles that can become carried over to the following round. Generally speaking, when attempting to pursue towards maximizing the potential of Long Life Spikes, it is worth purchasing Faster Production and Even Faster Production alongside to allow maximized net popping power stockpiles. Similar to the much more powerful Perma-Spike, Long Life Spikes is a deadly force when combined with Berserker Brew/Stronger Stimulant and Jungle Drums. Similar strategies can be used for the succeeding upgrade Deadly Spikes.

Long Life Spikes (and its successor) require external support to be closer to the viability of Spiked Balls later in the game. Berserker Brew and Stronger Stimulant are good examples of external supports, which providing it with +1 damage and +2 / +3 pierce.

This upgrade enhances Spike Factory's stockpiling potential and it is recommended to be used for defensive purposes to maximize its efficiency.


  • On single-entry-single-exit maps, always place a Long Life Spikes near the end of the bloon track. Then spikes will not be used up immediately, allowing spike stockpiling to slowly make the tower more and more valuable.
  • It is recommended to purchase the Path 2 Upgrades (Faster Production and Even Faster Production) over the Path 1 Upgrades (Bigger Stacks and White Hot Spikes) as Bigger Stacks only increases its pop count per spike from 5 to 10 and although White Hot Spikes allows it to pop any DDTs that may rush through the player's defense, a Monkey Intelligence Bureau or Acidic Mixture Dips can easily solve that problem while also providing it and other nearby towers with the bonus as well.
    • Path 2 upgrades will add +79% extra pops with a fast refresh, while Path 1 upgrades will add +100% extra pops with a slow refresh and allows Lead-popping. While 2-0-3 is better at overall spike production, 0-2-3 is much faster and synergizes much better when paired with Alch buffs.
  • Avoid leaving the game, as the stockpiled spikes do not carry over between saves.
  • Long Life Spikes does NOT decrease spike amount when purchasing Bigger Stacks.[1]
  • In Apopalypse Mode Long Life Spikes outside of increased lifespan are less useful as spikes without this upgrade do not disappear at the beginning of the next round.

Version History[]

Long Life Spikes itself wasn't ever buffed directly, but it did gain some changes based on previous Path 3 upgrades.

  • Buff Long Life Spikes now attacks 4x as fast for the first 2.5s of a round.
  • Change Affected by Spike Factory crosspath speed changes.
  • Change [Undocumented] Affected by Smart target priority changes from obtaining the Smart Spikes upgrade


Official artwork[]



  • The spikes produced by Spike Factories with this upgrade look somewhat similar to the Caltrops that Ninja Monkeys use.
  • This spike factory appearance mostly resembles the Bloons TD 5's MOAB-SHREDR Spikes upgrade.
  • Prior to the rework of Overclock's ability, double-discounting the whole 0-2-3 Spike Factory with two Monkey Commerces was used to make an Overclock on Perma-Spike last 15 seconds longer. This is because this discounting would bring down the total cost of the 0-2-3 Spike Factory to ~$3,752, thus bringing down the total cost of Perma-Spike to be ~$39,932, barely below the threshold for Overclock's duration penalty for $40,000+ towers.
    • Now, Perma-Spike overclocks will only last 30 seconds.