Recursive Cluster (BTD6)

For the upgrade in Bloons TD Battles 2, see Recursive Cluster (Battles 2).

Recursive Cluster

Every second shot the cluster bombs send out more cluster bombs for even more destruction.

Tower	Bomb Shooter — Path 3 — Tier 4
XP cost	10,000
Cash cost	$2,125 — Easy $2,500 — Medium $2,700 — Hard $3,000 — Impoppable

← Cluster Bombs

Bomb Blitz →

Recursive Cluster is the Bomb Shooter's path 3 tier 4 upgrade in Bloons TD 6. This upgrade increases the damage of all explosions by 1, and causes its cluster bombs to produce tertiary explosions on every second shot. While the secondary explosions visually spawn four tertiary explosions each, each of them are actually treated as one large explosion with more pierce and a larger radius than the secondary explosions. The tertiary explosions deal 2 Explosion damage, and have 4× pierce of the main clusters, for a total of 32 pierce (56 with Bigger Bombs and 96 with Heavy Bombs). Recursive bombs' main explosion also have 18 pierce, but do not gain pierce from crosspaths, only radius and damage.

Stats

For a complete list of Bomb Shooter stats, see Stats:Bomb Shooter (BTD6).

This data was last updated for: version 56.3

Tower
Display range 54 units Footprint radius 7 units Targeting options First Last Close Strong

Attack
Cooldown 1.5s Offset (X, Y, Z) 0, 7, 11.83 Targeting Depends on targeting option Targeting range 54 units Filters Cannot target Camo
Projectile Pierce 1 Max pierce 1 Speed 180 units/s Lifespan 0.6s Radius 4 units Filters Cannot hit Camo Cluster projectile Count 8 Angle 360° Pierce 1 Max pierce 1 Speed 130 units/s Min travel distance 20 units Max travel distance 30 units Radius 5 units Secondary cluster projectile Pierce 1 Max pierce 1 Lifespan 0.45s Persists between rounds 1 Radius 0 units Explosion Pierce 18 Damage 2 Damage type Explosion Lifespan 0.05s Persists between rounds 1 Radius 12 units Filters Cannot hit Camo Ignores blockers Cluster explosion Pierce 8 Damage 2 Damage type Explosion Lifespan 0.05s Persists between rounds 1 Radius 15 units Filters Cannot hit Camo Ignores blockers Secondary cluster explosion Pierce 24 Damage 2 Damage type Explosion Lifespan 0.05s Persists between rounds 1 Radius 34 units Filters Cannot hit Camo Ignores blockers

1-0-4

Attack
Projectile Radius 4 units → 5 units Explosion Radius 12 units → 18 units Cluster explosion Pierce 8 → 14 Radius 15 units → 22.5 units Secondary cluster explosion Pierce 24 → 42 Radius 34 units → 37.75 units

2-0-4

Attack
Explosion Damage 2 → 3 Cluster explosion Pierce 14 → 24 Damage 2 → 3 Secondary cluster explosion Pierce 42 → 72 Damage 2 → 3

0-1-4

Attack
Cooldown 1.5s → 1.125s

0-2-4

Tower
Display range 54 units → 58 units

Attack
Cooldown 1.125s → 0.825s Offset (X, Y, Z) 0, 7, 11.83 ↓ 0, 14.11, 12.73 Targeting range 54 units → 58 units
Projectile Speed 180 units/s → 270 units/s Lifespan 0.6s → 0.4s Cluster projectile Speed 130 units/s → 220 units/s Min travel distance 20 units → 30 units Max travel distance 30 units → 45 units

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
0-0-4	$3,465	$4,075	$4,400	$4,890	$2,426	$2,853	$3,080	$3,423
1-0-4	$3,675	$4,325	$4,670	$5,190	$2,573	$3,028	$3,269	$3,633
2-0-4	$4,230	$4,975	$5,370	$5,970	$2,961	$3,483	$3,759	$4,179
0-1-4	$3,675	$4,325	$4,670	$5,190	$2,573	$3,028	$3,269	$3,633
0-2-4	$4,015	$4,725	$5,100	$5,670	$2,811	$3,308	$3,570	$3,969

Strategy

This section was last updated for: version 53.0

Recursive Cluster is excessively powerful in Race modes, thanks to its extremely high pierce wiping out extreme amounts of Bloons at once, but either Striker Jones or another tower is required for Black Bloons. Outside of Races, Recursive Cluster is a good mid-game tower to counter clumped Bloons, but is not as powerful. Its power falls off starting on Round 81 due to Super Ceramics appearing.

If using Recursive Cluster spam, Striker Jones is the recommended Hero due to his plethora of buffs to Bomb Shooters. Primary Mentoring is recommended as well, due to it granting free Tier 1 upgrades.

2-0-4 is the preferred crosspath for Races and Bloonarius due to the supreme importance of pierce there, though 0-2-4 is better elsewhere due to it dealing more single-target damage.

Update history

For a complete list of Bomb Shooter changes, see Update history:Bomb Shooter (BTD6).

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Version 4.0

•  Secondary cluster: Rate increased ― Every 3rd shot → Every 2nd shot

Version 12.0

•  Upgrade cost increased ― $2,400 → $2,800

Version 22.0

“

Some low tier Bomb pierce has been shifted further up into the 2xx Heavy Bombs upgrade to effectively nerf 130 Mauler meta in price, but the price of these upgrades and MOAB Damage of T4 Maulers have both been buffed to benefit other variations of bomb better.
— Update notes

”

•  Pierce reduced ― 18 → 14

Version 28.0

“

We’ve acknowledged that Frag Bombs have felt like an inconsistent crosspath both in what they add to the tower and what they lose when upgraded further on their own path, so now in addition to frags popping Black Bloons xx2+ will allow all attacks from the tower to pop Black.
— Update notes

”

•  Overall cost reduced by $75 (due to cost changes for previous tiers)
•  Explosion: Damage type changed ― Explosion → Normal

Version 34.0

“

Cluster Bombs has far superior pierce over top path which is the actual pierce path while also providing better overall cleanup power, so for now we’d like to reign those in a little closer.
— Update notes

”

•  Cluster explosion: Pierce reduced ― 10 → 8
•  Secondary cluster explosion: Pierce reduced ― 60 → 48 (undocumented)

Version 35.0

“

Upon closer inspection, Recursive Cluster has been hitting pierce in the 100’s, far more than was really intended for it so we are pulling back on this but adding in some fortified bonus to cancel out this large weakness the upgrade has.
— Update notes

”

•  All attacks now deal +1 damage to Fortified
•  Recursive cluster: Pierce multiplier decreased ― x6 → x3
  • Note: Pierce reduced for all crosspaths. 004: 48 → 24, 104: 84 → 42, 204: 144 → 72

Version 38.0

“

Recursive Cluster is also having the pierce of the recursions increased a little again; while we felt it needed a nerf earlier, the amount cut from it last time was too high.
— Update notes

”

•  Secondary Cluster: Pierce multiplier increased ― ×3 → ×4

Version 40.0

“

A while ago Frag Bombs was reworked to give Bomb normal type damage however we were not happy with the results of that change in the end, we didn’t want to go back and remove that again without giving back something nice in return so it has taken a while but now we have decided to go ahead with changing that back
— Update notes

”

•  Explosion: Damage type changed ― Normal → Explosion
  • Note: Bloon Crush and MOAB Eliminator are unchanged
•  All explosions no longer deal +1 damage to Fortified
•  Damage of all explosions increased ― 1 → 2

Version 44.0

“

For a crosspathing trial we’re removing the limits on Frags buffability & also giving more of a range boost to Extra Range.
— Update notes

”

•  Overall cost reduced by $150 (due to cost changes for previous tiers)
•  Range bonus increased ― +7 → +12
  • Note: xx2 total range bonus increased from +9 to +14

Version 45.0

0-2-4

•  Missile Launcher's projectile speed modifier now applies to tertiary projectiles
  • Note: This increases area coverage, but reduces damage in the middle

Version 46.0

“

Players found the recent increased coverage of 024 recursive too much, but we like the functionality so we’ve tightened the spread for the base xx4 recursive to make 024 about the same as it was before but 004 even tighter.
— Update notes

”

•  Main explosion: pierce increased ― 14 → 22
•  Recursive explosion: Minimum distance for the spread of the cluster projectile reduced ― 30 → 20
•  Recursive explosion: Maximum distance for the spread of the cluster projectile reduced ― 36 → 30

Version 47.0

“

Cutting down roughly 10% on all bottom path upgrade costs as especially on Bomb Blitz even after recent buffs there are many downsides that need to be covered to use this path effectively.
— Update notes

”

•  Upgrade cost reduced ― $2,800 → $2,500
  •  Overall cost reduced by $400 (due to cost changes for previous tiers)

Gallery

For more Bomb Shooter images, see Gallery:Bomb Shooter.

Screenshots

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: Recursive creating two shots (one cluster shot, one recursive shot) with 0-0-4 and 0-2-4 (0-2-4 has the black "missile" without missile launcher face), and also each of the crosspath and uncrosspathed images

Assets

• 
  Portrait
• 
  Upgrade icon
• 
  Insta Monkey icon

Trivia

• Visually, each recursive cluster depicts 73 explosions in total: 1 from the main explosion, 8 from the cluster, and 64 from the recursive cluster.

In other languages

Language	Name / Description	Notes
Arabic	الكتلة المتكررة في كل ثانية يتم إطلاق قنابل عنقودية، يتم إرسال المزيد من القنابل العنقودية لمزيد من الدمار.	—
Danish	Gentagen Klynge For hvert andet skud affyrer klyngebomberne flere klyngebomber for at øge ødelæggelsen.	—
German	Rekursiv-Cluster Jeder zweite Schuss der Streubombe sendet mehr Streubomben aus die noch mehr verheeren.	—
Spanish	Racimo recursivo Cada segundo tiro las bombas de racimo sueltan más bombas de racimo y causan aún más destrucción.	—
Spanish (LA)	Racimo recursivo Cada segundo tiro las bombas de racimo sueltan más bombas de racimo y causan aún más destrucción.	—
Finnish	Rekursiivinen klusteri Joka 3. laukauksella rypälepommit lähettävät enemmän rypälepommeja vieläkin suurempaa tuhoa varten.	—
French	Sous-munitions récurrentes Tous les deux tirs, les bombes à sous-munitions envoient davantage de bombes à sous-munitions pour une destruction encore plus considérable.	—
Italian	Bombardamento ripetuto Ogni due colpi le bombe a grappolo lanciano altre bombe a grappolo per causare ancora più distruzione.	—
Japanese	再帰的クラスター 撃ったクラスター爆弾が、毎秒もっと沢山のクラスター爆弾を放出し、破壊力が増す。	—
Korean	순환 집속탄 2발마다 집속탄이 더 많은 집속탄을 방출해 더 많이 파괴합니다.	—
Dutch	Recursiecluster Bij elk tweede schot verspreiden de clusterbommen meer clusterbommen voor nog meer vernietiging.	—
Norwegian	Rekursiv klase For hvert 2. skudd klasebomben sender ut kommer det flere klasebomber for å gjøre enda mer ødeleggelse.	—
Polish	Rekurencyjne kasetowe Co drugi strzał bomby kasetowe wyrzucają jeszcze więcej bomb kasetowych, co zwiększa destrukcję.	—
Portuguese (Brazil)	Fragmentação Recursiva A cada segundo disparo a bomba de fragmentação lança ainda mais fragmentos para maior destruição.	—
Russian	Кассетная бомба Каждый 2-й выстрел кассетные бомбы выпускают ещё больше кассетных бомб увеличивая масштаб разрушений.	—
Swedish	Bedövande kluster Vartannat skott skickar klusterbomberna ut fler klusterbomber för ännu mera förstörelse.	—
Thai	คลัสเตอร์ซ้ำซ้อน ทุกนัดที่สอง ระเบิดคลัสเตอร์จะกระจายระเบิดคลัสเตอร์อีกทอด เพื่อพลังทำลายล้างที่มากขึ้น	—
Turkish	Tekrarlı Yığın Misket bombaları her saniye atıldığında çok daha fazla yıkım için daha fazla misket bombası gönderir.	—
Chinese (simplified)	循环集束 每2次射击发射更多集束炸弹，造成更大的破坏。	—
Chinese (traditional)	遞迴群集 每兩次射擊，群集炸彈會射出更多的群集炸彈，造成更多的破壞。	—
This list was last updated for: version 43.1