|“||Automatically generates piles of Road Spikes on the nearby track. Excellent last line of defense.||”|
|~ Bloons TD 6 Description|
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The Spike Factory is a tower that makes its first appearance in an update of Bloons TD 4 on September 8, 2011. It makes a return in an update of Bloons TD 5 Flash on the March 13, 2012 update, and later elsewhere in the rest of the BTD5 generation games. It returns once more since the initial release of Bloons TD 6, on June 13, 2018, and is categorized as a Support Monkey.
The main role of the Spike Factory is to produce spike piles across its range to pop bloons. In this way, many of its upgrades serve in primarily cleanup roles. In addition, the Spike Factory can pop camo bloons by default, making it an effective option at countering early-game camo bloons.
Spike Factory makes up to 10 appearances:
Bloons TD 4
- Main article: Spike Factory (BTD4)
In Bloons TD 4, the Spike Factory makes a debut. It was the second new tower to be released in Bloons TD 4, the third being Beekeeper only on Bloons TD 4 Mobile. The Spike Factory automatically generates spikes nearby.
Bloons TD 5
- Main article: Spike Factory (BTD5)
The Spike Factory makes a return in Bloons TD 5. It first appeared in a later update of Bloons TD 5 Flash. Spike Factory now has even more upgrade options for increasing its power against specialized bloon types. It also has received many changes in both versions of Bloons TD Battles in different ways.
Bloons TD 6
- Main article: Spike Factory (BTD6)
Initially the only offensive Support Monkey, the Spike Factory produces spikes on the bloon track. It was initially released with the release of the game. The core upgrade path structure for the Spike Factory has remained fairly the same when it was first released, with additional upgrades added for even more specialization.
|Bloons TD 4||$595||$700||$755||-|
|Bloons TD 5||$640||$750||$810||-|
|Bloons TD 5 Mobile||$640||$750||$810||$900|
|Bloons TD Battles||$750|
|Bloons TD Battles Mobile||$600|
|Bloons Monkey City||$TBA|
|Bloons Monkey City Mobile||$TBA|
|Bloons TD 6||$850||$1,000||$1,080||$1,200|
Before being upgraded, the Spike Factory shoots out clumps of five tacks at a rate of one shot nearly every three seconds (per second if fast-forwarded). These clumps always land in corners and disappear at the end of each round. If the Spike Factory is not placed in range of a corner, then the Spike Factory will act as if it is not in range of the track at all, and shoot spikes randomly in all directions. This tower will shoot randomly in its range and will not aim for bloons.
|Faster Production |
COST: $595 / $700 / $755
|Description: Makes the factory produce spikes much faster.
|Bigger Stacks |
COST: $510 / $600 / $650
|Description: The factory creates double size spike stacks.
|White Hot Spikes |
COST: $295 / $350 / $380
|Description: White hot spikes can pop Frozen and Lead Bloons.
|Spike Storm |
COST: $5,950 / $7,000 / $7,560
|Description: Every 15 seconds the factory generates a storm of short-lived spikes, filling up the entire track.
Bloons TD 6
- Main article: Spike Factory/Strategies
|“||Spike Factories are tailor made for guarding exits but can be used anywhere. Powerful upgrades include: White Hot Spikes, Spiked Ball Factory, MOAB-SHREDR, Spike Storm.||”|
|~ BMC Flash description|
|“||Generates piles of road spikes around the track automatically. Leftover spikes disappear at the end of each round.||”|
|~ Bloons TD 4 Description|
|“||Generates piles of road spikes on bits of nearby track. Each pile can pop 5 bloons, and unused spikes disappear at end of each round.||”|
|~ Bloons TD 5 Description|
- In BTD4, sometimes the Spike Storm will only cover 1/4-1/2 of the track, while in BTD5, it covers the whole track, but the spikes disappear faster than in BTD4.
- However, there was originally a bug where the Spike Storm ability only placed spikes in the Spike Factory's range.
- The spikes created by the Spike Factory will not be placed on the track if the Spike Factory placed far enough from the track. However, in BTD5 the spikes still have an effect if bloons hit it when being blown back by upgrades such as Distraction.
- Some players tend to call this tower the "Spactory", which is an abbreviated and shortened version of "Spike Factory".
Specific to BTD4
- This tower has the same colors as the Dartling Gun in BTD4. Both start out green/yellow at levels 1-3, blue/purple at level 4 and red at level 5.
- There is no hotkey for the Spike Factory in BTD4.
- In BTD4, each pile (without upgrades) appears to have 6 spikes, but it will pop only 5 bloons.
- In BTD4 iOS, there is a glitch that the Spike Factory can produce bigger stacks even without any upgrades.
- In BTD4 Expansion, the Spike Factory's logo in the shop is a Dart Monkey along with the Dartling Gun.
- In BTD4, Spike Factories may not place spikes in the track if placed too close to the Bloons' path.
Specific to BTD5
- It is possible to beat the entire game with only this tower because it can pop Camo Bloons, and with White Hot Spikes, Lead Bloons.
- In Bloons TD Battles, after the release of Bloontonium Mine, the Spike Factory was nerfed to fire half as fast compared to BTD5 and BMC with the spikes popping twice as many bloons as before.
- In BTD5, there is a glitch where when you buy Even Faster Production, it doesn't load the upgraded look unless it is under the range of a monkey village.
- In BTD5 (not Mobile), the piles with the Bigger Stacks upgrade won't pop the same amount as regular Road Spikes (10 and 11 Bloons respectively).
- On certain maps where the exit is parallel to the start, spikes that are placed at the exit will only pop MOAB class bloons because of their size. This is a great way to pop the MOAB layer, especially in Bloons Monkey City where many maps are like this.
- A 2-2 Spike Factory in earlier versions of BTD5 Flash used to look the same as an 1/1 one if upgraded to 1/1, then both tier 2 upgrades were bought. This could be solved by placing a village near the Spike Factory.
- The Spike Factory is the only tower other than the Boomerang Thrower that has different price in BMC than in BTD5. In BTD5 Mobile however, Boomerang Throwers cost $400.
- In Bloons TD Battles, Spiked Mines were a great way to freeze the opponent's computer, when spammed, due to the extreme amount of explosions.
- Upgrading a Spike Factory in both paths gives it a unique appearance, somewhat blending the colors of both upgrades.
- Upgrading a Spike Factory from 4/0 to 4/2 will turn it orange instead of the usual red, and upgrading a Spike Factory from 0/4 to 2/4 will turn it green instead of the usual blue.
- In Bloons Monkey City, the claim of the strength that it "never misses" is not entirely true, because if a Pink Bloon zooms fast enough past the Spike Factory, it cannot spew out the piles fast enough to catch it, unless it is placed far enough from the entrance.
- In Bloons Monkey City, the range of the Spike Factory is the range it had when placed. This means that when you place a Spike Factory and then a Monkey Village upgraded 1/0, it will only produce spikes inside the original range. If you place the Monkey Village first, the range will be increased.
- In BMC, 3 4/2 Spike Factories can beat any tiles with only one ending.
- They are restricted on Desert and High Desert BMC tiles.
- After a round in BMC, its spikes will disappear, with the exception of an MvM attack, where they will only disappear if they stay too long on the track or are used up.
Specific to BTD6
- The Spike Factory can have problems with extremely fast bloons such as freeplay DDT's in BTD6 (about Round 200+). If Bloons go fast enough it is possible for them to pass over the spikes but not register hitting them causing the bloons to take no damage.
- This happens because in one frame the bloon is behind the spike pile, and in the next frame the bloon is in front of the spike pile. It essentially teleported over the spike pile.
- In BTD6, the Spike Factory spikes in Apopalypse automatically disappeared once a round ends, which rendered the Spike Factory much less powerful due to disappearing at the wrong time. This has been fixed, changing the spikes to last between rounds, like in BTD5.