Ultraboost (BTD6)

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

Ultraboost

Ultra-Overclocked Monkeys gain a small but permanent boost every time they are overclocked.

Tower	Engineer Monkey — Path 2 — Tier 5
XP cost	35,000
Cash cost	$61,200 — Easy $72,000 — Medium $77,760 — Hard $86,400 — Impoppable

← Overclock

Master Builder →

Ultraboost is the Engineer Monkey's path 2 tier 5 upgrade in Bloons TD 6. It replaces the Engineer Monkey's Overclock Activated Ability with the Ultraboost ability, which on top of the Overclock effect, permanently reduces attack cooldown by 4% and increases range by 1.5% on Villages. This buff stacks up to 10 times additively on a single tower. The permanent cooldown decrease also applies to Banana Farms, making them produce more cash per round permanently. Ultraboost and Overclock buffs do not stack with each other, though both stack with the permanent boosts. The Ultraboost has a 10s shorter cooldown than the tier 4 ability at 35s, and the buff lasts 60s on all towers regardless of tier. The Ultraboost ability can only be used 10 times per round by a single Engineer Monkey, unlike Overclock which can be used without limit. Ultraboost's cooldown also resets to full when this tower is upgraded.

In addition to the ability changes, Ultraboost increases the base pierce of the Engineer Monkey's main attack by +15 (increased to 30), and increases the pierce of its Cleansing Foam puddles by +10 (increased to 24).

Stats

For a complete list of Engineer Monkey stats, see Stats:Engineer Monkey (BTD6).

This data was last updated for: version 55.1

Tower
Display range 60 units Footprint radius 7 units Targeting options First Last Close Strong

Attack
Cooldown 0.7s Offset (X, Y, Z) -5.17, 7.84, 11.3 Targeting Depends on targeting option Targeting range 60 units Filters Cannot target Camo
Projectile Pierce 30 Damage 1 Damage to MOAB-Class +1 Damage to Fortified +1 Damage type Sharp Speed 750 units/s Lifespan 0.12s Radius 2 units Filters Cannot hit Camo

Cleansing Foam
Cooldown 2s Offset (X, Y, Z) -5.17, 7.84, 11.3 Spread 4 Targeting Locked Targeting range 60 units
Ignores blockers
Projectile Pierce 1 Lifespan 5s Radius 1 unit Ignores blockers Splat Pierce 24 Lifespan 8.5s Radius 7 units Ignores blockers Removes Camo Removes Regrow Removes Lead

Ability
Cooldown 35s Max uses per round 10
Buff Village range modifier ×1.1 Cooldown modifier ×0.6 Max. stacks 1 Lifespan 60s Ultraboost buff Village range modifier ×1.015 Cooldown modifier ×0.96 Max. stacks 10

Start-of-round buff
Cooldown modifier ×0.25 Lifespan 1s

1-5-0

Spawner
Cooldown 10s Offset (X, Y, Z) -5.17, 7.84, 11.3 Targeting Random position Targeting range 60 units
Ignores blockers

Sentry

Tower
Display range 49 units Footprint radius 4 units Lifespan 25s Targeting options First Last Close Strong

Attack
Cooldown 0.95s Offset (X, Y, Z) 0, 7.1, 7.78 Targeting Depends on targeting option Targeting range 49 units Filters Cannot target Camo
Projectile Pierce 2 Damage 1 Damage to MOAB-Class +1 Damage to Fortified +1 Damage type Sharp Speed 300 units/s Lifespan 0.25s Radius 2 units Filters Cannot hit Camo Removes Camo Removes Regrow Removes Lead

2-5-0

Spawner
Cooldown 10s → 5s

Cleansing Foam
Cooldown 2s → 1s

0-5-1

Attack
Projectile Pierce 30 → 35 Damage type Sharp → Shatter

Cleansing Foam
Splat Pierce 24 → 36

0-5-2

Attack
Projectile Stun Multiplier ×0 Duration 1s Layers 1

Cleansing Foam
Splat Slow Multiplier ×0.5 Duration 2s Duration for MOAB-Class 0s Layers 0

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
0-5-0	$74,245	$87,350	$94,340	$104,820	$51,972	$61,145	$66,038	$73,374
1-5-0	$74,670	$87,850	$94,880	$105,420	$52,269	$61,495	$66,416	$73,794
2-5-0	$75,010	$88,250	$95,310	$105,900	$52,507	$61,775	$66,717	$74,130
0-5-1	$74,625	$87,800	$94,825	$105,360	$52,238	$61,460	$66,378	$73,752
0-5-2	$74,810	$88,020	$95,060	$105,625	$52,367	$61,614	$66,542	$73,938

Strategy

This section was last updated for: version 49.3

Due to its high price, Ultraboost is rarely viable in CHIMPS Mode and most standard game modes. However, it is a vital support during Boss events and Freeplay due to the strong permanent buffs it provides to towers over time. Stalling may be important to acquire as many stacks on towers as possible, though it's still capped by its 10 uses per round. Purchasing Ultraboost always sets the ability to full cooldown, so it's usually preferred if Overclock uses its ability one more time before upgrading to Ultraboost.

The most powerful towers such as (Vengeful) True Sun Gods should be given ×10 Ultraboost stacks as soon as possible, along with strong tier 5 towers such as M.A.D and Super Mines. Ultraboosting a Banana Central increases its cash production substantially, which is especially useful during Boss events. Note that Lych steals both the permanent and temporary buff of towers in range when it absorbs buffs, which heals the boss. If using Ultraboost against Lych, try to keep boosted towers far away from Lych during tiers 1-4, and do not use Ultraboost at all during tier 5.

The following table shows the increase in production of different Banana Farms after using Ultraboost, and if they have the Overclock active or not.

Number of bananas or crates produced by Ultraboosted farms

Farm		0-0-0 0-X-0 0-0-1 0-0-2	1-0-0 1-X-0 1-0-1 1-0-2	2-0-0 2-X-0 2-0-1 2-0-2	3-X-X 0-0-3 0-0-4 0-0-5	4-X-X 5-X-X	1-0-3 1-0-4 1-0-5	2-0-3 2-0-4 2-0-5
Normal		4	6	8	16	5	18	20
Overclock		7	10	14	27	9	30	34
1 Ultraboost	Overclock	8	11	15	29	10	32	36
	No overclock	5	7	9	17	6	19	21
2 Ultraboosts	Overclock	8	11	16	30	10	33	37
	No overclock	5	7	9	18	6	20	22
3 Ultraboosts	Overclock	8	12	16	31	11	35	39
	No overclock	5	7	10	19	6	21	23
4 Ultraboosts	Overclock	9	12	17	33	11	36	41
	No overclock	5	8	10	20	6	22	24
5 Ultraboosts	Overclock	9	13	18	34	12	38	43
	No overclock	6	8	11	21	7	23	26
6 Ultraboosts	Overclock	10	14	19	36	12	40	45
	No overclock	6	8	11	22	7	24	27
7 Ultraboosts	Overclock	10	14	20	38	13	42	48
	No overclock	6	9	12	23	7	26	28
8 Ultraboosts	Overclock	11	15	21	40	14	45	51
	No overclock	6	9	12	24	8	27	30
9 Ultraboosts	Overclock	11	16	22	43	15	47	54
	No overclock	7	10	13	26	8	29	32
10 Ultraboosts	Overclock	12	17	24	46	16	51	57
	No overclock	7	11	14	27	9	31	34

As a supportive tower, Ultraboost is a very poor damage dealer by itself despite the fact that it gains pierce. It usually should not be crosspathed at all, since none of the crosspaths improve the ability.

Update history

For a complete list of Engineer Monkey changes, see Update history:Engineer Monkey (BTD6).

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Version 14.0

•  Ability: attack speed buff reduced ― +100% → +66.7% (does not affect Farms or Village range)
•  Ability: now affects submerged Monkey Subs
•  Ability: can no longer target Phoenixes (which does nothing)
•  Ability: permanent attack speed buff reduced ― +10% → +6.67% (max +80%)

Version 16.0

•  Ultraboost: will no longer trigger while techbotted if no target was previously set

Version 17.0

•  Ability: No longer causes Pat Fusty's Big Squeeze to activate more than once (bug fix)

Version 20.0

“

Continuing our efforts to make crosspaths meaningful and fit the style of each path more solidly, a number of crosspath and base level balance shifts were made.
— Update notes

”

•  Ability: permanent stacking buff now applies immediately upon ability use (instead of on expiration)

1-5-0, 2-5-0

•  Larger Service Area crosspath now increases Sentry range by +4

Version 21.0

“

Engineer is quite poor in terms of crosspathing, so we’ve added crosspath benefits to Cleansing Foam [...] We’ve been somewhat unhappy with how Overclock sits in the game for a while and especially how the interaction with tower cost causes levelling heroes naturally to be far advantageous over purchasing upgrades when this is already underused. We have made an attempt to rework these issues by moving it to a tier-based system rather than price.
— Update notes

”

•  Overall cost reduced by $150 (due to cost changes for previous tiers)

0-5-1, 0-5-2

•  Foam attack: Pierce with Oversized Nails increased ― 10 → 15

Version 23.0

“

We’ve added a pierce & speed boost to Overclock’s base upgrade and lowered the cooldown on Ultraboost to allow the possibility for it to achieve full uptime as a freeplay tower and get its stacks up faster.
— Update notes

”

•  Pierce increased ― 3 → 30
•  Ultraboost: ability cooldown reduced ― 45s → 35s
•  Ultraboost: initial cooldown reduced ― 15s → 5s (undocumented)
•  Projectile speed increased ― 375 → 750

1-5-0, 2-5-0

•  Deconstruction: now grants all Sentries +1 damage to Fortified & MOAB

Version 29.0

“

we have also re-envisioned the ‘Larger Service’ crosspath as giving smarter service as well in the form for targeting for Bloontrap & Cleansing Foam
— Update notes

”

•  Overall cost reduced by $50 (due to cost changes for previous tiers)
•  Foam attack: Manual targeting option added

Version 30.0

• Foam attack: Now counts damage when popping Lead Bloons (bug fix)

Version 31.0

“

a large decrease to Ultraboost price.
— Update notes

”

•  Upgrade cost reduced ― $120,000 → $105,000
  •  Overall cost reduced by $14,950 (due to cost changes for previous tiers)

0-5-2

•  Pin crosspath allows Cleansing Foam to slow Bloons by 50% for 2 seconds
•  Pin crosspath allows Cleansing Foam to slow all MOAB-class (including BADs) by 50% for 2 seconds (bug)

1-5-0, 2-5-0

•  Foam makes Sentries shoot Foamy nails that strip properties

Version 31.1

“

032 Engineer Cleansing Foam now works correctly on all MOAB Class targets - hope you enjoyed that temporary treat
— Update notes

”

0-5-2

•  Cleansing Foam: no longer slows MOAB-class bloons (including BADs) with Pin crosspath (bug fix)

Version 32.0

0-5-2

•  Cleansing Foam slow stacks on a single target (bug)

Version 32.1

•  Ability: now limited to 3 uses per round

0-5-2

•  Foam slow effect no longer stacks on a single target (bug fix)

Version 33.0

“

The MOAB offense of top path lacks for a mainly dps tower that is quite complex to use [...] the 320 crosspath will now be able to double dip on the Fortified & MOAB damage bonuses that it gains. Cleansing Foam is only seeing a slight tweak to help it be more viable if you want to attempt it as 'main camo detection’, and this mainly fixes some issues in ABR games allowing it to catch quick initial camo spawns.
— Update notes

”

•  All attacks: Now gains 1s of 4x rate on round start

1-5-0, 2-5-0

•  Sentry: Deconstruction's bonus damage to MOAB-Class Bloons and Fortified Bloons are no longer mutually exclusive

Version 34.0

“

Overclock's considerable longer duration benefit on lower tiers currently serves little purpose and only leads to weirdness in upgrading boosted towers, so for now we’d rather minimize this on the early cases that don’t serve much purpose .
— Update notes

”

•  Ability: no longer has a 1.75× duration bonus for tier 0 towers
•  Ability: no longer has a 1.5× duration bonus for tier 1 towers
•  Ability: no longer has a 1.25× duration bonus for tier 2 towers
•  Ability: Lasts 60s on heroes regardless of level (undocumented)

Version 35.0

“

Engineer Ultraboost is limited to viable use in high-farming situations due to its cost, and while the buff is great when applied to strong towers, we find it too expensive for an upgrade that only adds a buff to other towers, especially in games where cost is the primary focus.
— Update notes

”

•  Upgrade cost reduced ― $105,000 → $72,000

Version 41.0

“

Some minor QoL buffs for Ultraboost as it’s very expensive over multiple T4s.
— Update notes

”

•   Ultraboost cleansing foam pierce ― 10 → 30
•   Ultraboost ability now has full duration on T4s ― 0.75x → 1x
•   Ultraboost ability now has full duration on T5s ― 0.5x → 1x

Version 45.0

“

The Ultraboost ability is now starting on cooldown to put a limit on buy’n’resell issues, but this is to ease up on the use per round limit which was causing frustration.
— Update notes

”

•  Ability: now starts with its full cooldown instead of carrying over Overclock's cooldown
•  Ability: max uses per round increased ― 3 → 10

Version 46.0

“

Now that Ultraboost has an initial cooldown we are again allowing it to be used between rounds.
— Update notes

”

•  Ultraboost ability: can now be activated during the break between rounds

Version 47.0

“

This was becoming annoying screen clutter with large numbers of sentries, and feels unnecessary when you can overclock the engineer itself to create more sentries instead.
— Update notes

”

•  Overclock and Ultraboost abilities no longer target Engineer sentries

Version 48.0

“

Really only one major change here; a rebalancing to how the 2xx Crosspath applies across various engineer upgrades, and some base stats being changed to accommodate fitting this.
— Update notes

”

•  Foam: Pierce decreased ― 30 → 24

0-5-1, 0-5-2

•  Foam: Pierce increased ― 35 → 36

Version 50.0

“

Overclock’s Village range bonus always felt like an odd special case, and now that there is a proper dedicated range bonus ability the combined range this grants for villages ended up being overpowered, after consideration we didn’t want to jump straight to deleting the ultraboost stacking tech here but have lowered the range bonuses from Overclock.
— Update notes

”

•  Overclock buff: Range bonus on Monkey Villages decreased ― +25% → +10%
  • Note: Also affects the temporary Ultraboost effect. Does not affect Paragon's Power Glove (+25%)
•  Ultraboost buff: Range bonus on Monkey Villages per stack decreased ― +2.5% → +1.5%

Gallery

For more Engineer Monkey images, see Gallery:Engineer Monkey.

Screenshots

• 
  Ultraboost for all upgrades
• 
  Ultraboost ability affecting a Dart Monkey

Assets

• 
  Portrait
• 
  Upgrade/ability icon
• 
  Insta Monkey icon
• 
  Buff icon

In other languages

Language	Name / Description	Notes
Arabic	المعزز الفائق اكتساب القرود فائقي التخطي للحاجز الزمني السرعة دفعة صغيرة ولكن دائمة في كل مرة يتم فيها رفع تردد التشغيل.	—
Danish	Ultraboost Ultra-tunede aber får et lille, men permanent boost, hver gang tuning bruges.	—
German	Ultraboost Ultra-übertaktete Affen erhalten einen kleinen, aber dauerhaften Boost bei jedem Übertakten.	—
Spanish	Ultraincremento Los monos sobreacelerados reciben un incremento pequeño y permanente cada vez que reciben sobreaceleración.	—
Spanish (LA)	Ultraincremento Los monos sobreacelerados reciben un incremento pequeño y permanente cada vez que reciben sobreaceleración.	—
Finnish	Ultratehostus Superylikellotetut apinat saavat pienen mutta pysyvän tehostuksen aina kun ne ylikellotetaan.	—
French	Ultraboost Les singes ultra-surpuissants reçoivent un boost, léger mais permanent, à chaque fois qu'ils sont en surpuissance.	—
Italian	Ultra potenziamento Le scimmie ultra-sovraccaricate ottengono un potenziamento di lieve entità ma permanente ogni volta che vengono sovraccaricate.	—
Japanese	ウルトラブースト ウルトラオーバー時計能力を備えたモンキーの攻撃範囲とパワーが短時間大きくなり、全タイプのブルーンにダメージを与える。	—
Korean	울트라부스트 울트라급으로 오버클록된 원숭이는 오버클록될 때마다 효과는 작지만 영구적인 부스트를 얻습니다.	—
Dutch	Ultraboost Ultra-overklokte Apen krijgen een kleine maar permanente boost telkens als ze overklokt worden.	—
Norwegian	Ultraboost Ultra-overklokkede aper får små, men permanente boostere hver gang de overklokkes.	—
Polish	Ultrawzmacniacz Ultra podkręcone małpki zyskują małe, ale trwałe doładowanie za każdym razem, gdy zostają podkręcone.	—
Portuguese (Brazil)	Ultraimpulso Macacos em Ultraoverclock ganham um pequeno, porém permanente, bônus a cada Overclock.	—
Russian	Ультраусилитель Ультраразогнанные обезьяны получают небольшое, но постоянное усиление каждый раз, когда их разгоняют.	—
Swedish	Ultraförstärkning Apor i överklockat läge får en liten men permanent effekthöjning varje gång de överklockas.	—
Thai	อัลตร้าบูสต์ ลิงอัลตร้าโอเวอร์คล็อกได้รับบูสต์เล็กน้อยแต่อยู่ถาวรทุกครั้งที่ได้รับการโอเวอร์คล็อก	—
Turkish	Ultra Güçlendirme Ultra Hız Aşırtan Maymunlar hız aşırtmaya her ulaştıklarında küçük ama kalıcı bir destek kazanır.	—
Chinese (simplified)	超级强化 极超频猴每次超频都会获得少量但永久的提升。	—
Chinese (traditional)	超級增強 超級超頻猴子每次超頻時都可以獲得一點永久提升。	—
This list was last updated for: version 43.1