Perma-Spike (BTD6)

For the upgrade in Bloons TD Battles 2, see Perma-Spike (Battles 2).

Perma-Spike

High damage spikes become almost permanent.

Tower	Spike Factory — Path 3 — Tier 5
XP cost	29,500
Cash cost	$25,500 — Easy $30,000 — Medium $32,400 — Hard $36,000 — Impoppable

← Deadly Spikes

Mega Massive Munitions Factory →

Perma-Spike is the Spike Factory's path 3 tier 5 upgrade in Bloons TD 6. Spike piles are produced about 3.46x slower (without crosspaths, every 1.75s to 6.06s), but deal 10 damage, have 50 pierce (85 with 1-0-5), last up to 300 seconds, and carry over up to 3 rounds. Additionally, the 4x start-of-round speed boost now lasts for 10 seconds. Uniquely, spikes placed by a Perma-Spike are preserved when loading a save, though any buffs the spikes had will be lost.

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 42 units Footprint radius 8 units Targeting options Normal Close Smart Automatic Set Target

Attack
Cooldown 6.0625s Offset (X, Y, Z) 0, 0, 20.1 Targeting Depends on targeting option Targeting range 42 units Filters Cannot target Camo
Ignores blockers
Projectile Pierce 50 Damage 10 Damage type Sharp Lifespan 300s Persists between rounds 3 Radius 6 units Rehit interval 0.001s Ignores blockers

Start-of-round buff
Cooldown modifier ×0.25 Lifespan 10s

1-0-5

Attack
Projectile Pierce 50 → 85

2-0-5

Attack
Projectile Damage type Sharp → Normal

0-1-5

Attack
Cooldown 6.0625s → 4.85s

0-2-5

Attack
Cooldown 4.85s → 3.6375s

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
0-0-5	$30,985	$36,450	$39,365	$43,740	$21,690	$25,515	$27,556	$30,618
1-0-5	$31,665	$37,250	$40,230	$44,700	$22,166	$26,075	$28,161	$31,290
2-0-5	$32,175	$37,850	$40,880	$45,420	$22,523	$26,495	$28,616	$31,794
0-1-5	$31,495	$37,050	$40,015	$44,460	$22,047	$25,935	$28,011	$31,122
0-2-5	$32,175	$37,850	$40,880	$45,420	$22,523	$26,495	$28,616	$31,794

Strategy

This strategy section is empty or incomplete. See the strategy guidelines for more information on how to write strategy sections. The editor who added this notice elaborates: more use cases, synergies, game modes of use, etc, also stats of spikes per second rate comparisons

This article was last updated for: version 49.3

Perma-Spike is an exceptionally effective cleanup tower suitable for many single-exit maps, most notably for CHIMPS on maps such as Glacial Trail. Berserker Brew, Abyssal Warrior, and Jungle Drums are recommended for relatively inexpensive buffs to maximize its cleanup potential, but especially the Acidic Mixture Dip's lead-popping to handle DDTs without 2-0-5 crosspath.

Crosspathing is beneficial to maximize the size of its stockpiles. Bigger Stacks grants 2% more damage output than Even Faster Production if external buffs are not present (1.7x damage output instead of 1.667x). However, with a flat pierce buff of at least 3, Even Faster Production would grant very slightly better damage output, though with +3 pierce the difference would only be ~0.4%.

Pair Perma-Spike with a form of stall, such as Horned Owl or MOAB Shove. The extra time to build up spikes is important to maintaining healthy stockpiles against difficult rounds. Unstable Concoction also pairs particularly well with Perma-Spike, as concoctions can do massive damage to the outer layers on dense rounds such as 98, while Perma-Spike is one of few towers adept at handling the huge rushes of MOABs and Ceramic Bloons the potions tend to create.

Update history

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

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Version 2.0

•  Upgrade cost increased ― $22,000 → $25,000
•  Attack cooldown increased ― 3s → 6s (attack speed reduced by 50%)
• Far targeting no longer causes the game to crash if it cannot reach the track (bug fix)

Version 8.0

1-0-5, 2-0-5

•  Pierce increased ― 60 → 70

Version 12.0

•  Upgrade cost increased ― $25,000 → $30,000
•  Projectiles are now saved
•  Projectile lifespan reduced ― 350s → 300s
•  Projectile max rounds reduced ― 4 → 3

Version 14.0

•  Now gains a 4× attack speed buff for 2.5 seconds at the start of each round

Version 15.0

•  Spike piles no longer save (bug)

Version 21.0

•  Rounds before projectiles expire increased ― 3 → 4 (undocumented)

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)

0-1-5

•  Rate reduced ― 3.6s → 4.8s (undocumented)

0-2-5

•  Rate reduced ― 2.7s → 3.36s (undocumented)

Version 23.2

“

[...] after recent changes to low tiers unintentionally caused it to perform much worse
— Update notes

”

•  Attack cooldown reduced ― 6s → 4.85s (attack speed increased by 23.71%)
  • Stacks with 0-1-5 Faster Production crosspath ― 4.8s → 3.88s
  • Stacks with 0-2-5 Faster Production crosspath ― 3.36s → 2.716s

Version 24.0

“

In addition, Permaspike’s neglected crosspath has had a small pierce increase as currently their only real use is under custom challenge rules.
— Update notes

”

•  Smart targeting now places spikes as far back on the track as it can, rather than directly in front of the Bloon closest to leaking (undocumented)

1-0-5

•  Pierce increased ― 70 → 80

Version 28.0

“

Some minor changes to a few upgrades on Spike Factory evening out some aspects of it.
— Update notes

”

1-0-5

•  Pierce increased ― 80 → 90

Version 32.0

•  Selling this tower now allows other towers to inherit the start-of-round buff (bug)

Version 36.0

“

Permaspike, while admittedly not often utilized to its max potential, has sat in a dominant high end position for a long time so we are shifting it away from such high pierce into more damage per pierce.
— Update notes

”

•  Pierce per spike pile reduced ― 50 → 25
•  Damage increased ― 10 → 15

1-0-5, 2-0-5

•  Pierce per spike pile reduced ― 90 → 45

Version 38.0

“

Finally, we enjoyed the hard hitting nerf to Permaspike’s early game, but admittedly this change didn’t really change much of anything for its endgame power while impacting pre r80 rounds far more, so we’re redoing the nerf into a pure attack speed nerf along with an increased benefit to the start of round rate buff to reduce the necessity in playing slowly with it
— Update notes

”

•  Pierce increased ― 25 → 50
•  Damage reduced ― 15 → 10
•  Attack cooldown increased ― 4.85s → 6.0625s (attack speed reduced by 20%)
•  Start-of-round buff duration increased ― 2.5s → 10s

1-0-5, 2-0-5

•  Pierce increased ― 45 → 90

Version 39.0

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

Version 45.0

“

Permaspike is seeing a small crosspath fix, as the x2x rate change threw this balance out.
— Update notes

”

1-0-5, 2-0-5

•  Pierce reduced ― 90 → 85

Version 49.0

“

This update we’ve finally decided to nerf Permaspike by completely removing the ‘Far’ target priority from the earlier Smart Spikes upgrade. We know that this loss will be incredibly painful to deal with for the many spike factory enjoyers out there, so we have also included a couple other minor QoL adjustments to the Smart Spikes upgrade in a hopeful attempt to offset this.
— Update notes

”

•  Reworked targeting options ― Normal, Close, Far, Smart → Normal, Close, Smart, Set Target, Automatic
  •  Smart Spikes: Adds a "Set Target" option, which allows to select the place inside the Spike Factory's range where the spikes go to.
  •  Smart Spikes: Adds a "Automatic" option, attempts to directly target the first bloon
  •  Removed "Far" targeting option

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

Language	Name / Description	Notes
Arabic	مسامير دائمة تصبح السنون والنتوءات عالية الضرر شبه دائمة.	—
Danish	Perma-søm Højeffektive søm bliver næsten permanente.	—
German	Perma-Stacheln Nägel mit hohem Schaden sind fast permanent vorhanden.	—
Spanish	Permaclavo Los clavos de gran daño se vuelven casi permanentes.	—
Spanish (LA)	Permaclavo Los clavos de gran daño se vuelven casi permanentes.	—
Finnish	Pysyvä piikki Tehokkaat piikit tulevat melkein pysyviksi.	—
French	Perma-pointes Les pointes à dégâts élevés deviennent presque permanentes.	—
Italian	Perma-aculeo Gli aculei a danni elevati diventano quasi permanenti.	—
Japanese	パーマスパイク 高ダメージスパイクが、ほぼ永久的に持続するようになる。	—
Korean	영구 스파이크 공격력이 높은 스파이크가 거의 영구적이 됩니다.	—
Dutch	Permaspies Stekels die grote schade doen worden bijna permanent.	—
Norwegian	Perma-spiker Spiker med høy skade blir nesten en permanent funksjon.	—
Polish	Perma-kolce Kolce zadające duże obrażenia stają się niemal permanentne.	—
Portuguese (Brazil)	Espinho Permanente Espinhos de alto dano se tornam quase permanentes.	—
Russian	Вечные шипы Наносящие сильный урон шипы становятся почти вечными.	—
Swedish	Permaspik Spikar som åsamkar stor skada blir nästan permanenta.	—
Thai	ตะปูถาวร ตะปูดาเมจสูงแทบจะอยู่อย่างถาวร	—
Turkish	Kalıcı Çivi Yüksek hasarlı çiviler neredeyse kalıcı hale gelir.	—
Chinese (simplified)	永久刺钉 高伤害刺钉变得几乎不可磨灭。	—
Chinese (traditional)	永久針刺 高傷害針刺幾乎變得永久存在。	—
This list was last updated for: version 43.1