Spike Factory (BTD6)

Spike Factory iterations: BTD4 • BTD5 • Battles • BMC • BTD6 • Battles 2

Spike Factory

Automatically generates piles of Road Spikes on the nearby track. Excellent last line of defense.

Unlock method(s)	Choose at levels 22, 23, 24, or 26
Category	Support
Cost	$850 — Easy $1,000 — Medium $1,080 — Hard $1,200 — Impoppable With First Last Line of Defense: $700 — Easy $850 — Medium $930 — Hard $1,050 — Impoppable
Hotkey	J
Introduced	Launch

The Spike Factory is a Support tower in Bloons TD 6. It attacks by passively dispensing piles of spikes onto the nearby track that damage Bloons on contact. It generates a spike pile every 1.75 seconds, each pile contains 5 spikes (6 with One More Spike), and each spike deals 1 damage. Each spike pile disappears at the end of the round or after 50 seconds, which allows it to build up a thick layer of spikes over time. It can't damage Lead Bloons or frozen Bloons, which destroy its spike piles without being damaged.

It can be upgraded to dispense explosive spiked mines, MOAB-class-Bloon-shredding spikes with drastically increased attack speed, as well as laying spikes over the whole track, or increasing the duration and damage of the spikes.

Mechanics

This article or section needs more screenshots. See the screenshot guidelines for more information on what screenshots are needed and how to add them. The editor that added this notice elaborates: Base Spac with 5-spike piles, and clearing out some stray bloons

The Spike Factory's basic attack places a pile of spikes onto a random point on the track within its range every 1.75 seconds. It can attack even if there are no Bloons within its range, and it can deploy spikes onto parts of the track that are behind line of sight blockers, but it can't deploy spikes if there is no point on the track within its range. Each pile is a projectile that can re-hit Bloons every frame, and the number of spikes in the pile represents the amount of pierce it has. If its pierce is increased, it displays more spikes in the pile accordingly; it can only visually show up to 20 spikes, but it has no pierce cap. By default, each pile contains 5 spikes (6 with One More Spike) that each deal 1 sharp-type damage. Spike piles expire on their own at the end of each round (except in Apopalypse mode, Race Events, CT Time Attack, and Boss Rush), after a Boss Bloon spawns, or 50 seconds after being deployed.

Although the Spike Factory's spikes can hit Camo Bloons, its attack is not considered to have Camo detection. This means that the Spike Factory does not allow Advanced Intel to target Camo Bloons in its range, nor does it allow Gerry's Fire to target or hit Camo Bloons if used on it.

Upgrades

Path 1

Bigger Stacks

Tier 1 — 170 XP to unlock

Creates larger piles of spikes per shot.

$680 — Easy
$800 — Medium
$865 — Hard
$960 — Impoppable

This upgrade increases the pierce of new spike piles. For most Spike Factories, the pierce increases from 5 to 10. The pierce of Carpet of Spikes increases from 10 to 15, while the pierce bonus of Perma-Spike is +35, from 50 to 85. Despite its name, the spike piles don't have a larger radius.

White Hot Spikes

Tier 2 — 600 XP to unlock

Cuts through Lead Bloons and Frozen Bloons.

$510 — Easy
$600 — Medium
$650 — Hard
$720 — Impoppable

The damage type of newly placed spikes are changed from sharp to normal, allowing them to pop Frozen and Lead Bloons.

Spiked Balls

Tier 3 — 2,400 XP to unlock

Produces spiked balls that do extra damage to Ceramic and Fortified Bloons.

$1,955 — Easy
$2,300 — Medium
$2,485 — Hard
$2,760 — Impoppable

Instead of spike piles, it dispenses spiked balls that deal 2 Normal-type damage, +3 Ceramic damage, and +1 Fortified damage, and have 11 pierce.

Spiked Mines

Tier 4 — 15,000 XP to unlock

Spiked mines explode violently when they lose all their spikes.

$8,075 — Easy
$9,500 — Medium
$10,260 — Hard
$11,400 — Impoppable

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.

Super Mines

Tier 5 — 32,500 XP to unlock

Creates gigantic exploding spiked mines that can wipe out almost anything.

$106,250 — Easy
$125,000 — Medium
$135,000 — Hard
$150,000 — Impoppable

This upgrade dispenses super mines half as quickly (every 3.5 seconds), but the mines deal much more damage and have many more explosions that can pop any Bloon type. Each super mine has 18 pierce, dealing 50 Normal-type damage, +30 Ceramic damage, and +15 Fortified damage. Every time a spike is depleted, a non-burning mini-explosion is produced, dealing 20 damage, with +15 Ceramic damage and +5 Fortified damage, to up to 30 non-Purple Bloon Bloons within 30 radius. If the super mine expires, it generates a huge burning explosion that deals 1,000 Normal-type damage, plus +500 Ceramic and +250 Fortified damage, to up to 60 Bloons within 100 radius (133 with 5-0-1). The burn damage-over-time is increased from 10 damage to 2,500 damage every 2 seconds for up to 6.05 seconds.

Path 2

Faster Production

Tier 1 — 180 XP to unlock

Rapidly increases production rate.

$510 — Easy
$600 — Medium
$650 — Hard
$720 — Impoppable

This upgrade reduces the attack cooldown of the Spike Factory's attack by 20%, increasing its attack speed by +25%. For most Spike Factories, except Super Mines and Perma-Spike, attack cooldown is reduced from 1.75 seconds to 1.4 seconds.

Even Faster Production

Tier 2 — 650 XP to unlock

Increases production rate even more.

$680 — Easy
$800 — Medium
$865 — Hard
$960 — Impoppable

This upgrade reduces the attack cooldown of the Spike Factory's attack by 25%, increasing its attack speed by about +33.33%. In total, combined with the Faster Production upgrade, the total cooldown reduction is 40%, for a total attack speed bonus of about +66.67%. For most Spike Factories except Super Mines and Perma-Spike, attack cooldown reduces from 1.4 seconds to 1.05 seconds.

MOAB SHREDR

Tier 3 — 2,500 XP to unlock

Super-Hard-Rending-Engine-Driven-Razors shred MOAB-Class Bloons.

$2,125 — Easy
$2,500 — Medium
$2,700 — Hard
$3,000 — Impoppable

This upgrade increases the damage the Spike Factory's spikes deal to MOAB-Class Bloons by +7, for a total of 40 damage per pile (54 with One More Spike and Very Shreddy) and 80 damage when crosspathed with Bigger Stacks (99 with One More Spike and Very Shreddy).

Spike Storm

Tier 4 — 11,000 XP to unlock

Spike Storm ability: Shoots out a thick layer of spikes over the entire track.

$5,950 — Easy
$7,000 — Medium
$7,560 — Hard
$8,400 — Impoppable

This upgrade grants the Spike Storm ability, and does not change the Spike Factory's main attack. When the ability is activated, spike piles are scattered over all available lanes, launching clusters of 4 spike piles every 0.04 seconds for 2 seconds, resulting in up to 204 spike piles per ability (208 on every 4th use). This attack has a minimum cooldown equal to its base cooldown, meaning it does not benefit from any attack speed buffs unless its attack speed is being reduced by something like a Jar of Pickles. Storm spikes are distributed randomly across available lanes (based on the amount of track area; longer lanes and overlapping areas will get a proportionately larger share of the spikes) and they last 9–11 seconds. Each group of 4 simultaneous spike pile launches is considered 4 separate attacks rather than 1, limiting the uptime of buffs that use a shot counter (e.g. Berserker Brew). The ability has a cooldown of 50 seconds.

Crosspaths affect the Spike Storm ability. Storm spikes gain +5 pierce in the same way as the main spikes when given Bigger Stacks, and change from Sharp to Normal damage type if given White Hot Spikes. With Long Reach, storm spikes last +100% longer (18–22 seconds), and with Smart Spikes the ability will only send spikes to the active lanes of the current round.

Carpet of Spikes

Tier 5 — 35,000 XP to unlock

Regularly sets a carpet of spikes over the whole track.

$34,850 — Easy
$41,000 — Medium
$44,280 — Hard
$49,200 — Impoppable

This upgrade grants a passive Spike Storm ability every 15 seconds, behaving identically to its activated Spike Storm ability, which is mechanically unchanged from the previous tier (only the spike stats are changed). Notably, this attack's minimum cooldown is the same as its default cooldown (both 0.04 seconds), meaning it does not benefit from any attack speed buffs unless its attack speed is being reduced by something like a Jar of Pickles. The passive and activated Spike Storms cannot both fire simultaneously.

Additionally, all of the Spike Factory's spikes deal +2 damage and have +5 pierce, and the main attack gains +100% increased attack speed (0.525-second attack cooldown) and more range (50 instead of 34). Both the main and ability spikes deal 3 damage, +7 to MOAB-Class. Each spike pile has 10 pierce, or 15 with the 1-5-0 crosspath. Passive and active Spike Storm spikes last for 18-22 seconds (36-44 seconds with 0-5-1) and can persist across 1 round.

Path 3

Long Reach

Tier 1 — 120 XP to unlock

Increases range for spike pile drops, plus piles last longer.

$130 — Easy
$150 — Medium
$160 — Hard
$180 — Impoppable

This upgrade increases the Spike Factory's range by 8 distance units (from 34 to 42) and increases the lifespan of its spike piles during a round from 50 to 100 seconds. It also has the following benefits when given as a crosspath:

• Spike Storm and Carpet of Spikes — Their spikes from the ability, and the passive for the latter upgrade, last twice as long.
• Spiked Mines and Super Mines — Blast radius of all their explosions increased by ~33%

Smart Spikes

Tier 2 — 550 XP to unlock

Spike Factory gains special targeting priority and accelerated production at the start of each round.

$340 — Easy
$400 — Medium
$430 — Hard
$480 — Impoppable

This upgrade gains a tower buff at the start of each round that quadruples its attack speed for 3 seconds. If crosspathed with Spike Storm and Carpet of Spikes, their abilities will only dispense spikes on paths that currently have Bloons on them, and their abilities will dispense more spikes if they're triggered while the buff is still active. The buff can be absorbed by Lych. The Spike Factory also gains four new targeting options in addition to the default random behavior, which is labeled as Normal in the options:

• Close — Dispenses spikes on the nearest section of track within range.
• Smart — Targets whichever track has the Bloons that are closest to reaching the exit (or has Bloons at all), and dispenses spikes on the point closest to the end of that track. If it cannot reach any paths that have Bloons on them, it will dispense spikes on the points closest to the ends of each track within its range, keeping their coverage roughly even.
• Set Target — Dispenses spikes to any location within range, the target point can be selected by clicking the Set Target button on the tower's menu and it can be set outside the track.
• Automatic — Changes behavior depending if there are Bloons in range, if there are, the Spike Factory will target its spikes towards the Bloon that is closest to the exit ("First" targeting). Otherwise it will drop the spikes in the closest point to the front of the track within range, also, if there is more than one track in range, the spikes will be divided in a similar way to the Smart targeting.

Long Life Spikes

Tier 3 — 2,100 XP to unlock

Spikes last much longer and can carry over one round.

$1,105 — Easy
$1,300 — Medium
$1,405 — Hard
$1,560 — Impoppable

Newly placed blue caltrop-like spike piles last for up to 140 seconds and can carry over 1 round, lasting up to 2 rounds. Like Smart Spikes, its predecessor, its attack speed quadruples at the start of each round, and has four additional targeting options (Close, Smart, Set Target, Automatic).

Deadly Spikes

Tier 4 — 9,000 XP to unlock

Extra deadly spikes can pop through 3 layers per spike and last another round.

$3,060 — Easy
$3,600 — Medium
$3,890 — Hard
$4,320 — Impoppable

This upgrade increases damage of newly placed spike piles from 1 to 3, and they carry over 2 rounds instead of 1, lasting up to 3 rounds instead of 2. Spikes still last for up to 140 seconds.

Perma-Spike

Tier 5 — 29,500 XP to unlock

High damage spikes become almost permanent.

$25,500 — Easy
$30,000 — Medium
$32,400 — Hard
$36,000 — Impoppable

Spike piles are produced about 3.46× slower (without crosspaths, attack cooldown is increased from 1.75 to 6.06 seconds), but they now deal 10 damage per spike, have 50 pierce (85 with 1-0-5), last up to 300 seconds, and carry over up to 3 rounds. Additionally, the 4× start-of-round speed boost now lasts for 10 seconds. Unlike other Spike Factories (except the Paragon), spikes placed by a Perma-Spike are preserved when loading a save, though any buffs the spikes had will be lost.

Paragon

Mega Massive Munitions Factory

Tier 6 — 1,000,000 XP to unlock

A factory of explosive spike Bloon annihilation.

$637,500 — Easy
$750,000 — Medium
$810,000 — Hard
$900,000 — Impoppable

The Mega Massive Munitions Factory deploys giant spiked mines in its radius which last for up to 5 rounds and split into 10 smaller spike piles after exploding. It has the same targeting options as Smart Spikes. It also creates a permanent carpet of spikes on the track that passively damages all Bloons on the map, similar to the vines created by Spirit of the Forest. It has two Activated Abilities:

• Controlled Burst — Quadruples its main attack's attack speed for 15 seconds and is only usable once per round, similar to Smart Spikes.
• Spikeageddon — Launches powerful land mines that land on approximately equally spaced intervals along each path that explode on contact with a Bloon, dealing massive damage and releasing 3 smaller spike piles. Activating the ability while there are still mines on-screen detonates them instead of spawning more mines. The number of mines dispensed depends on the track length and number of paths.

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, 12.13 Targeting Depends on targeting option Targeting range 34 units Filters Cannot target Camo
Ignores blockers
Projectile Pierce 5 Damage 1 Damage type Sharp Lifespan 50s Radius 6 units Rehit interval 0.001s Ignores blockers

Related Monkey Knowledge

This list does not include Monkey Knowledge that affects all Support towers.

Monkey Knowledge	Cost	Prerequisites	Introduced
One More Spike Spike Factory stacks get +1 spike.	Free	—	Launch
First Last Line of Defense Purchase price of first Spike Factory each game is $150 less.	Free	One More Spike	Version 22.0
Very Shreddy MOAB SHREDR spikes do +1 extra damage to MOAB-Class Bloons.	250	3 invested First Last Line of Defense	Launch
Hi-Value Mines Spiked Mines cost reduced by 1500.	500	8 invested Very Shreddy	Launch

Rogue Legends

Starter parties with Spike Factories

Hero	Insta Monkey 1	Insta Monkey 2	Artifact
Benjamin	0-2-0 Sniper Monkey	1-0-0 Spike Factory	Slipped on the Peel Legendary (adds  2-0-0 Banana Farm)
Pat Fusty	0-2-0 Tack Shooter	2-0-0 Spike Factory	Heightened Perception Legendary
Smudge Catt	0-2-0 Alchemist	0-1-0 Spike Factory	Cats Meow Legendary (adds  0-0-4 Bomb Shooter)
Firecracker Gwen	2-0-0 Wizard Monkey	2-0-0 Spike Factory	Blitzing Ape Barrage Emitter Legendary
Decryptor Corvus	1-0-2 Spike Factory	1-0-2 Monkey Village	Power Nexus Rare

Related Artifacts

This list does not include Artifacts that affect all Support towers.

Artifact	Common effect	Rare effect	Legendary effect
Explosive Economics	When Support Monkeys are sold, an Area of Effect explosion deals 250 damage to all nearby Bloons. Spike Factory, Engineer, and Beast Handler placement cooldown reduced 1 round(s)	When Support Monkeys are sold, an Area of Effect explosion deals 500 damage to all nearby Bloons. Spike Factory, Engineer, and Beast Handler placement cooldown reduced 1 round(s)	When Support Monkeys are sold, an Area of Effect explosion deals 900 damage to all nearby Bloons. Spike Factory, Engineer, and Beast Handler placement cooldown reduced 2 round(s)
Swelling Spikes	Spike Factories attack half as fast, but have 115% more pierce. Adds a 1-0-1 Spike Factory to your Party	Spike Factories attack half as fast, but have 120% more pierce. Adds a 2-0-1 Spike Factory to your Party	Spike Factories attack half as fast, but have 135% more pierce. Adds a 2-0-0 Spike Factory to your Party

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
0-0-0	$850	$1,000	$1,080	$1,200	$595	$700	$756	$840
1-0-0	$1,530	$1,800	$1,945	$2,160	$1,071	$1,260	$1,362	$1,512
1-1-0	$2,040	$2,400	$2,595	$2,880	$1,428	$1,680	$1,817	$2,016
1-0-1	$1,660	$1,950	$2,105	$2,340	$1,162	$1,365	$1,474	$1,638
0-1-0	$1,360	$1,600	$1,730	$1,920	$952	$1,120	$1,211	$1,344
0-1-1	$1,490	$1,750	$1,890	$2,100	$1,043	$1,225	$1,323	$1,470
0-0-1	$980	$1,150	$1,240	$1,380	$686	$805	$868	$966
2-0-0	$2,040	$2,400	$2,595	$2,880	$1,428	$1,680	$1,817	$2,016
2-1-0	$2,550	$3,000	$3,245	$3,600	$1,785	$2,100	$2,272	$2,520
2-2-0	$3,230	$3,800	$4,110	$4,560	$2,261	$2,660	$2,877	$3,192
2-0-1	$2,170	$2,550	$2,755	$3,060	$1,519	$1,785	$1,929	$2,142
2-0-2	$2,510	$2,950	$3,185	$3,540	$1,757	$2,065	$2,230	$2,478
0-2-0	$2,040	$2,400	$2,595	$2,880	$1,428	$1,680	$1,817	$2,016
1-2-0	$2,720	$3,200	$3,460	$3,840	$1,904	$2,240	$2,422	$2,688
0-2-1	$2,170	$2,550	$2,755	$3,060	$1,519	$1,785	$1,929	$2,142
0-2-2	$2,510	$2,950	$3,185	$3,540	$1,757	$2,065	$2,230	$2,478
0-0-2	$1,320	$1,550	$1,670	$1,860	$924	$1,085	$1,169	$1,302
1-0-2	$2,000	$2,350	$2,535	$2,820	$1,400	$1,645	$1,775	$1,974
0-1-2	$1,830	$2,150	$2,320	$2,580	$1,281	$1,505	$1,624	$1,806
3-0-0	$3,995	$4,700	$5,080	$5,640	$2,797	$3,290	$3,556	$3,948
3-1-0	$4,505	$5,300	$5,730	$6,360	$3,154	$3,710	$4,011	$4,452
3-2-0	$5,185	$6,100	$6,595	$7,320	$3,630	$4,270	$4,617	$5,124
3-0-1	$4,125	$4,850	$5,240	$5,820	$2,888	$3,395	$3,668	$4,074
3-0-2	$4,465	$5,250	$5,670	$6,300	$3,126	$3,675	$3,969	$4,410
0-3-0	$4,165	$4,900	$5,295	$5,880	$2,916	$3,430	$3,707	$4,116
1-3-0	$4,845	$5,700	$6,160	$6,840	$3,392	$3,990	$4,312	$4,788
2-3-0	$5,355	$6,300	$6,810	$7,560	$3,749	$4,410	$4,767	$5,292
0-3-1	$4,295	$5,050	$5,455	$6,060	$3,007	$3,535	$3,819	$4,242
0-3-2	$4,635	$5,450	$5,885	$6,540	$3,245	$3,815	$4,120	$4,578
0-0-3	$2,425	$2,850	$3,075	$3,420	$1,698	$1,995	$2,153	$2,394
1-0-3	$3,105	$3,650	$3,940	$4,380	$2,174	$2,555	$2,758	$3,066
2-0-3	$3,615	$4,250	$4,590	$5,100	$2,531	$2,975	$3,213	$3,570
0-1-3	$2,935	$3,450	$3,725	$4,140	$2,055	$2,415	$2,608	$2,898
0-2-3	$3,615	$4,250	$4,590	$5,100	$2,531	$2,975	$3,213	$3,570
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
0-4-0	$10,115	$11,900	$12,855	$14,280	$7,081	$8,330	$8,999	$9,996
1-4-0	$10,795	$12,700	$13,720	$15,240	$7,557	$8,890	$9,604	$10,668
2-4-0	$11,305	$13,300	$14,370	$15,960	$7,914	$9,310	$10,059	$11,172
0-4-1	$10,245	$12,050	$13,015	$14,460	$7,172	$8,435	$9,111	$10,122
0-4-2	$10,585	$12,450	$13,445	$14,940	$7,410	$8,715	$9,412	$10,458
0-0-4	$5,485	$6,450	$6,965	$7,740	$3,840	$4,515	$4,876	$5,418
1-0-4	$6,165	$7,250	$7,830	$8,700	$4,316	$5,075	$5,481	$6,090
2-0-4	$6,675	$7,850	$8,480	$9,420	$4,673	$5,495	$5,936	$6,594
0-1-4	$5,995	$7,050	$7,615	$8,460	$4,197	$4,935	$5,331	$5,922
0-2-4	$6,675	$7,850	$8,480	$9,420	$4,673	$5,495	$5,936	$6,594
5-0-0	$118,320	$139,200	$150,340	$167,040	$82,824	$97,440	$105,238	$116,928
5-1-0	$118,830	$139,800	$150,990	$167,760	$83,181	$97,860	$105,693	$117,432
5-2-0	$119,510	$140,600	$151,855	$168,720	$83,657	$98,420	$106,299	$118,104
5-0-1	$118,450	$139,350	$150,500	$167,220	$82,915	$97,545	$105,350	$117,054
5-0-2	$118,790	$139,750	$150,930	$167,700	$83,153	$97,825	$105,651	$117,390
0-5-0	$44,965	$52,900	$57,135	$63,480	$31,476	$37,030	$39,995	$44,436
1-5-0	$45,645	$53,700	$58,000	$64,440	$31,952	$37,590	$40,600	$45,108
2-5-0	$46,155	$54,300	$58,650	$65,160	$32,309	$38,010	$41,055	$45,612
0-5-1	$45,095	$53,050	$57,295	$63,660	$31,567	$37,135	$40,107	$44,562
0-5-2	$45,435	$53,450	$57,725	$64,140	$31,805	$37,415	$40,408	$44,898
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

For more in-depth strategies, see Strategy:Spike Factory (BTD6).

This section was last updated for: version 55.2

Spike Factory's capability to stockpile makes it a versatile cleanup option, and its higher-tiers are capable of dealing high damage to MOAB-class bloons. Generally, it serves as a last line of defense, to be placed at the end of the track so there's enough time to build up spikes. Base and lower-tier Spike Factory assist cleanup, especially early Camos, allowing it to tank all Camos up to round 37 on single-lane maps.

The first path is pierce-oriented, and its higher tiers are mainly for cleanup against stray Ceramics, as well as groups with Spiked Mines and above. These higher tier upgrades are generally preferred at the back of the lanes, but can sometimes be used for direct DPS. For crosspaths, White Hot Spikes offers innate popping of Leads, especially DDTs, in addition to additional direct strength of stockpiles.

The second path is speed-oriented and its higher tiers specialize in single-target damage to MOAB-class. Its activated abilities are an excellent option against single targets, with Spike Storm being a potent support against the Round 100 BAD, and Carpet of Spikes excelling against most non-dense rounds and fighting off Boss Bloons. When used as a crosspath, it offers consistent production, refreshing spike piles quicker.

The third crosspath focuses on utility, and higher tiers improve lifespan and the efficiency of stockpiles. In addition to long-lasting spikes, Smart Spikes enables focused targeting of spikes, which is important on multi-lane maps or to micromanage spike placements. Starting from Long Life Spikes stalling out rounds is important to maximize spikes for the next round(s).

Tips

• If Smart Spikes cannot be bought, it is advised to place Spike Factory such that it has barely enough range to reach the track, in order to minimize random placement of spikes.
• With One More Spike, two 0-0-0 Spike Factories are almost as cost-efficient than a single 1-0-0 but has a better refreshment rate.

Update history

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

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Version 22.0

•  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

”

•  Cost increased ― $800 → $1,000
•  Base spike factory rate increased ― 2.2s → 1.75s

Version 39.0

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

Related achievement

$40K	Josh's Constant B-B-Beat any Expert map on CHIMPS with $40,870 or more spent on 1 Spike Factory Reward(s):  0-0-3 Spike Factory Insta

Cosmetic items

Item	Category	Unlock method(s)	Introduced
Spike Factory Pineapples	Monkeys — Projectiles	Trophy Store —  50	Version 23.0

Gallery

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

Screenshots

This section needs more screenshots. See the screenshot guidelines for more information on what screenshots are needed and how to add them.

Assets

• 
  Portrait
• 
  Insta Monkey icon

In other languages

This section was last updated for: version 48.0

Name

Language	Text	Notes
Arabic	مصنع المسامير	—
Danish	Sømfabrik	—
German	Nagelfabrik	—
Spanish	Fábrica de clavos	—
Spanish (Latin America)	Fábrica de clavos	—
Finnish	Piikkitehdas	—
French	Usine de herses	—
Italian	Fabbrica di aculei	—
Japanese	スパイク工場	—
Korean	스파이크 공장	—
Dutch	Stekelfabriek	—
Norwegian	Spikerfabrikk	—
Polish	Fabryka kolców	—
Portuguese (Brazil)	Usina de Espinhos	—
Russian	Шиповой завод	—
Swedish	Spikfabrik	—
Thai	โรงงานตะปู	—
Turkish	Çivi Fabrikası	—
Chinese (simplified)	刺钉工厂	—
Chinese (traditional)	針刺工廠	—

Description

Language	Text	Notes
Arabic	إنشاء أكوام من مسامير الطريق على المسار القريب. آخر خط دفاع ممتاز.	—
Danish	Genererer automatisk bunker af vejsøm på vejen i nærheden. En fortræffelig sidste forsvarslinje.	—
German	Erzeugt automatisch haufenweise Nagelsperren auf der Strecke nebenan. Eine exzellente letzte Verteidigungslinie.	—
Spanish	Genera montones de abrojos de forma automática en la pista cercana. Excelente para la última línea de defensa.	—
Spanish (Latin America)	Genera montones de abrojos de forma automática en la pista cercana. Excelente para la última línea de defensa.	—
Finnish	Levittää automaattisesti tiepiikkien pinoja lähellä olevalle radalle. Erinomainen viimeinen puolustuslinja.	—
French	Génère automatiquement des tas de herses sur le circuit à proximité. Excellente dernière ligne de défense.	—
Italian	Genera automaticamente mucchi di aculei da strada da collocare sui tracciati vicini. Eccellente come ultima linea di difesa.	—
Japanese	近くのトラックに路上スパイクの山を自動的に作り出す。最後の防衛線として最適。	—
Korean	근처의 트랙에 자동으로 로드 스파이크를 무더기로 생성합니다. 최후의 방어선으로 제격이지요.	—
Dutch	Genereert automatisch stapels kraaienpoten op het nabije pad. Uitstekende laatste verdedigingslinie.	—
Norwegian	Genererer automatisk bunker med veispikere på banen i nærheten. Utmerket som siste forsvarslinje.	—
Polish	Automatycznie generuje stosy kolców drogowych na najbliższej ścieżce. Doskonała ostatnia linia obrony.	—
Portuguese (Brazil)	Automaticamente cria pilhas de espinhos na pista adjacente. Excelente última linha de defesa.	—
Russian	Автоматически генерирует кучи дорожных шипов на ближайшей трассе. Отличное средство для последней линии обороны.	—
Swedish	Skapar automatiskt högar med vägspikar på intilliggande vägar. Utmärkt sista försvarslinje.	—
Thai	สร้างกองตะปูบนถนนเส้นทางที่อยู่ใกล้เคียงโดยอัตโนมัติ เป็นแนวป้องกันสุดท้ายอันยอดเยี่ยม	—
Turkish	Yakındaki parkur üzerinde otomatik olarak bir yığın Yol Çivisi oluşturur. Mükemmel bir son savunma hattı.	—
Chinese (simplified)	在附近的路径上自动生成一堆道钉。堪称强大的最后防线。	—
Chinese (traditional)	在附近的路徑上自動生成一堆路刺。優秀的最后防線。	—