Spiked Mines (BTD6)

For other uses, see Spiked Mines (disambiguation).

Spiked Mines

Spiked mines explode violently when they lose all their spikes.

Tower	Spike Factory — Path 1 — Tier 4
XP cost	15,000
Cash cost	$8,075 — Easy $9,500 — Medium $10,260 — Hard $11,400 — Impoppable With Hi-Value Mines: $6,575 — Easy $8,000 — Medium $8,760 — Hard $9,900 — Impoppable

← Spiked Balls

Super Mines →

Spiked Mines is the Spike Factory's path 1 tier 4 upgrade in Bloons TD 6. Instead of spiked balls, it dispenses spiked mines that explode after expiring. Each spiked mine has 18 pierce, dealing 2 Normal-type damage, +6 Ceramic damage, and +3 Fortified damage. After losing all spikes or expiring naturally, the spiked mine explodes over 30 blast radius (40 with Long Reach). The explosion has 30 pierce and deals 10 Explosion-type damage, deals +2 Ceramic and +3 Fortified damage, and ignites Bloons without Purple Bloon properties with a burning damage-over-time effect that inflicts 10 damage every 2 seconds for up to 6.05 seconds.

Stats

For a complete list of Spike Factory stats, see Stats:Spike Factory (BTD6).

This data was last updated for: version 55.1

Tower
Display range 34 units Footprint radius 8 units Targeting options Normal

Attack
Cooldown 1.75s Offset (X, Y, Z) 0, 0, 15 Targeting Depends on targeting option Targeting range 34 units Filters Cannot target Camo
Ignores blockers
Projectile Pierce 18 Damage 2 Damage to Ceramic (excl. Ceramic Armor Shell) +6 Damage to Fortified +3 Damage type Normal Lifespan 50s Radius 6 units Rehit interval 0.001s Ignores blockers Explosion Pierce 30 Damage 10 Damage to Ceramic (excl. Ceramic Armor Shell) +2 Damage to Fortified +3 Damage type Explosion Lifespan 0.1s Radius 30 units Ignores blockers Damage over time Damage 10 Damage type Fire Duration 6.05s Interval 2s Layers ∞

4-1-0

Attack
Cooldown 1.75s → 1.4s
Explosion Ignores blockers

4-2-0

Attack
Cooldown 1.4s → 1.05s

4-0-1

Tower
Display range 34 units → 42 units

Attack
Targeting range 34 units → 42 units
Projectile Lifespan 50s → 100s Explosion Radius 30 units → 40 units Ignores blockers

4-0-2

Tower
Targeting options Close Smart Automatic Set Target

Start-of-round buff
Cooldown modifier ×0.25 Lifespan 3s

Costs and sell values

Note: this list does not factor in Monkey Knowledge or other discounts.

Tiers	Total cost				Sell value
	Easy	Medium	Hard	Impoppable	Easy	Medium	Hard	Impoppable
4-0-0	$12,070	$14,200	$15,340	$17,040	$8,449	$9,940	$10,738	$11,928
4-1-0	$12,580	$14,800	$15,990	$17,760	$8,806	$10,360	$11,193	$12,432
4-2-0	$13,260	$15,600	$16,855	$18,720	$9,282	$10,920	$11,799	$13,104
4-0-1	$12,200	$14,350	$15,500	$17,220	$8,540	$10,045	$10,850	$12,054
4-0-2	$12,540	$14,750	$15,930	$17,700	$8,778	$10,325	$11,151	$12,390

Strategy

This section was last updated for: version 51.2

Spiked Mines is mainly a mid-game upgrade, with the explosions greatly helping the tower's performance against mid-game Ceramic rushes and higher damage giving better layer skipping. It responds well to Berserker Brew and Jungle Drums support, and in late game it is somewhat stronger than its cost in Spiked Balls. The explosions become much harder to use late game, as their small radius limits their effectiveness against the lower density of Super Ceramics. Ceramic slowdown such as Arctic Wind can help clump Ceramics for better explosion damage, but means diverting more money away from late game blimp damage. The napalm DoT's chip damage can assist breaking down groups of Bloons, but generally not advised to revolve around.

Its higher cost means it is most useful on single exit maps such as Dark Castle, but it can also be useful on maps such as Ravine and Quad due to getting to cover multiple lanes there. Bottom crosspath with 4-0-2 is used on maps with split lanes (e.g. Ravine) and maps that have short exits, both of which require consistent placement of mines. Middle crosspath, which increases attack speed, is preferred for general consistency and on maps with overlapping lanes (e.g. Quad).

Update history

For a complete list of Spike Factory changes, see Update history:Spike Factory (BTD6).

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Version 7.0

•  Upgrade cost reduced ― $14,000 → $12,000
  •  Overall cost reduced by $2,200 (due to cost changes for previous tiers)

Version 8.0

•  Explosion: Damage increased ― 4 → 5
•  Spike: Damage to Ceramics increased ― +2 → +3

Version 12.0

•  Explosion: Damage increased ― 5 → 10

Version 19.0

•  Spike damage increased ― 1 → 2

Version 21.0

“

[W]e made a couple small tweaks buffing what should be the ‘strength areas’ of a few of the more underperforming high tier Spike upgrades.
— Update notes

”

•  Explosion: Blast radius increased ― 15 → 19

Version 22.0

“

We quite liked how the lifespan changes for xx1 spikes went previously, though this still wasn’t enough to make the path competitive and increasing this number further wouldn’t have much of an impact since most earlier rounds aren’t long enough. Spiked Balls strats have also felt too strong compared to higher tiers on top path, so touching on all of these issues slightly the base lifespan of spikes has been reduced, ceramic bonus increased on 4xx; and a new bonus added to 5xx.
— Update notes

”

•  Base projectile lifespan reduced ― 70s → 50s
  • Note: Long Reach lifespan remains at 100s

Version 23.0

“

Like a few other towers before it, the attack speed crosspath for Spike Factory has outshined the others. We have reworked the lower Spike Factory tiers to distribute this power more evenly while keeping high tier factories at a similar level of power.
— Update notes

”

•  Overall cost increased by $200 (due to cost changes for previous tiers)
•  Base spike factory rate increased ― 2.2s → 1.75s

4-1-0

•  Rate reduced ― 1.32s → 1.4s

4-2-0

•  Rate increased ― 0.99s → 0.98s

Version 24.0

“

Spiked Balls are used quite a lot, but we like their overall position right now so they have had only a slight bump up in price, along with a bigger decrease to the price of T4 Spiked Mines.
— Update notes

”

•  Upgrade cost reduced ― $12,000 → $11,000
  •  Overall cost reduced by $900 (due to cost changes for previous tiers)

Version 26.0

“

Pierce amounts for Spiked Balls and Mines fits their use cases too awkwardly due to super ceramics. Considering the power of Spiked Balls, their pierce has been reduced slightly to add value to the pierce focussed higher tier in addition to a price cut for Spiked Mines.
— Update notes

”

•  Upgrade cost reduced ― $11,000 → $9,500
•  Pierce reduced ― 17 → 14

Version 33.0

“

Spike Factory 4xx feels it needs a small boost in order to really start feeling worth upgrading to rather than getting multiple T3s in the lategame due to the improved Spiked Mines pierce not being as needed for Super Ceramics.
— Update notes

”

•  Damage to Fortified per spike increased ― +1 → +3
•  Explosion: Damage to Fortified increased ― +1 → +3

Version 35.0

“

Spiked Mines explosion radius doesn’t hit too much since it’s almost always centered just in front of the ‘first bloon in a pack’ to hit it in most effective use cases
— Update notes

”

•  Explosion: Radius increased ― 19 → 30

Version 36.0

“

Spiked Balls provides incredibly powerful cleanup in all stages of gameplay, and we like the use here but for a cheap T3 it doesn't drop off enough lategame with the lower pierce requirements there.
— Update notes

”

•  Pierce per spiked ball reduced ― 14 → 12

Version 37.0

“

We’ve heard the feedback, so Spiked Mines get a tweak to get more mines exploding but with less pierce on each, to overall increase quality of life in more frequent use but less wasted pierce. This will help out with some of the problems it has scaling into late game super ceramics.
— Update notes

”

•  Spike pierce increased ― 12 → 20
•  Explosion: Pierce reduced ― 40 → 30
•  DoT: Damage increased ― 1 → 10

Version 38.0

“

Further balance for 401 crosspath, while this does already see some niche use it made sense to include increased explosion radius with the larger tower range.
— Update notes

”

4-0-1, 4-0-2

•  Explosion: Radius increased ― 30 → 40

Version 39.0

•  Spike Factory no longer can shotgun spikes for exactly one frame after spawning (bug fix)

Version 40.0

“

Small spike pierce reduction for the Spiked Mines as it’s finally coming into a strong spot on its own.
— Update notes

”

•  Pierce per spiked mine reduced ― 20 → 18

Version 52.0

•  Damage over time: Duration increased ― 6.0s → 6.05s (bug fix)
  • Note: This change solved an issue where the final tick of the damage was not being applied

Gallery

For more Spike Factory images, see Gallery:Spike Factory.

Screenshots

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Assets

• 
  Portrait
• 
  Upgrade icon
• 
  Insta Monkey icon

In other languages

This section was last updated for: version 49.1

Name

Language	Text	Notes
Arabic	الألغام المسننة	—
Danish	Sømminer	—
German	Nagelminen	—
Spanish	Minas con clavos	—
Spanish (Latin America)	Minas con clavos	—
Finnish	Piikkimiinat	—
French	Mines pointues	—
Italian	Mine acuminate	—
Japanese	スパイク付き地雷	—
Korean	스파이크 지뢰	—
Dutch	Stekelmijnen	—
Norwegian	Spikerminer	—
Polish	Kolczaste miny	—
Portuguese (Brazil)	Minas de Espinhos	—
Russian	Шипованные мины	—
Swedish	Spikminor	—
Thai	กับระเบิดตะปู	—
Turkish	Dikenli Mayınlar	—
Chinese (simplified)	刺钉地雷	—
Chinese (traditional)	帶刺地雷	—

Description

Language	Text	Notes
Arabic	انفجار الألغام المسننة بعنف عندما فقدان جميع أشواكها.	—
Danish	Sømminer eksploderer voldsomt, når de mister alle deres søm.	—
German	Nagelminen explodieren heftig, wenn sie alle Nägel verloren haben.	—
Spanish	Las minas con clavos explotan con violencia cuando pierden todos sus clavos.	—
Spanish (Latin America)	Las minas con clavos explotan con violencia cuando pierden todos sus clavos.	—
Finnish	Piikkimiinat räjähtävät voimallisesti, kun ne menettävät kaikki piikkinsä.	—
French	Les mines pointues explosent violemment lorsqu'elles perdent toutes leurs pointes.	—
Italian	Le mine acuminate esplodono violentemente quando perdono tutti gli aculei.	—
Japanese	スパイク付き地雷のスパイクがなくなると、激しく爆破する。	—
Korean	스파이크를 모두 잃으면 스파이크 지뢰가 폭발합니다.	—
Dutch	Stekelmijnen exploderen heftig als ze al hun stekels verliezen.	—
Norwegian	Spikerminer eksploderer voldsomt når de mister alle spikerne sine.	—
Polish	Kolczaste miny brutalnie eksplodują, gdy stracą wszystkie kolce.	—
Portuguese (Brazil)	Minas de espinhos explodem violentamente quando perdem todos os espinhos.	—
Russian	Колючие ядра мощно взрываются, потеряв все шипы.	—
Swedish	Spikminor exploderar våldsamt när de förlorar alla sina spikar.	—
Thai	กับระเบิดตะปูระเบิดอย่างรุนแรงเมื่อสูญเสียตะปูทั้งหมดไป	—
Turkish	Çivili mayınlar tüm çivileri yok olduğunda şiddetli bir şekilde patlar.	—
Chinese (simplified)	在失去刺钉后，刺钉地雷会猛烈爆炸。	—
Chinese (traditional)	帶刺地雷在失去所有針刺後劇烈爆炸。	—