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Razor Rotor blades rip up Bloons on contact, including Lead and Frozen Bloons.
~ In-game description

Razor Rotors is the third upgrade of Path 1 for the Heli Pilot in Bloons TD 6. It adds a razor rotor attack, popping and dealing 2 damage every 0.45s (0.36s with 3-0-2) within a radius of 35. The Razor Rotor attack can also pop Lead Bloons and Frozen Bloons. Razor Rotors have 10 pierce per cycle.

Starting from Version 31.0, the Pursuit targeting is modified to set the Heli to follow much closer to the bloons while still advancing slightly ahead of them. This is exclusive to this Tier 3 upgrade to highlight the razor rotor attack.

This upgrade costs $1,485 on Easy, $1,750 on Medium, $1,890 on Hard, and $2,100 on Impoppable. If this tower is nearby Level 6+ Rosalia's workshop, this upgrade costs $1,415 on Easy, $1,660 on Medium, $1,795 on Hard, and $1,995 on Impoppable.




Razor Rotors shredding bloons, including Leads

Razor Rotors adds the eponymous rotors to the Heli, adding a light grey sharp edge to the end of each rotor. It also extends the wings outward and adds a red stripe to both of them, and gives the Heli a sharper nose.

Crosspathing changes appearance of the helicopter. Path 2 crosspathing adds an additional yellow and green tail rotor, then paints the ends of the wings yellow. Path 3 crosspathing adds a yellow or green chevron to each wing.

Razor Rotors gains the eponymous attack, which functions as a source of Contact Damage, dealing 2 damage with up to 10 pierce every 0.45 seconds (or 0.32 seconds with 3-0-2) within a circular area-of-effect; the Rotors are also Normal type, thus are able to pop any bloon type. It additionally has a unique mechanic involving Pursuit: the Heli Pilot now moves much closer to the front of the first bloon, therefore allowing the Razor Rotors to deal their damage more consistently with Pursuit active.

Targeting Priorities[]

Razor Rotors utilizes touch-based mobility and self-mobility to move around the screen with different flight targetings. Its main attack shoots straight movement projectiles, which originate from the Heli Pilot with its independent range like an ordinary tower.

  • Follow Touch / Follow Mouse: Moves to where the player taps. On desktop versions, Follow Touch instead becomes Follow Mouse, which will make the Heli Pilot move to wherever the cursor is currently at.
  • Lock In Place: Stops the Heli Pilot where it is when the Target Priority is selected. Can be adjusted to choose a different locked location.
  • Patrol: Patrols between two spots chosen by the player. Can be adjusted to choose different points.
  • Pursuit: Equivalent to the target priority First, except the Heli Pilot will follow in front of the bloons while shooting them. It is unlocked with the purchase of the second upgrade on the first path, with the same name as the target priority. Once upgraded to the respective upgrade, it automatically switches to this target priority.

The Heli Pilot's main attacks always default on First based on the range of the helicopter's weaponry. Its rotor attack is locked on Close.


Updated as of Version 43.0. Listed prices exclude external buffs, any sacrifices, and Monkey Knowledge.
[Module | Data] Purchase Sell
Costs Easy Medium Hard Impoppable Easy Medium Hard Impoppable
Upgrade (3-X-X) $1,485 $1,750 $1,890 $2,100 -
Total (3-0-0) $3,950 $4,650 $5,025 $5,580 $2,765 $3,255 $3,518 $3,906
Crosspath (3-1-0) $4,205 $4,950 $5,350 $5,940 $2,944 $3,465 $3,745 $4,158
Crosspath (3-2-0) $4,715 $5,550 $6,000 $6,660 $3,301 $3,885 $4,200 $4,662
Crosspath (3-0-1) $4,160 $4,900 $5,295 $5,880 $2,912 $3,430 $3,707 $4,116
Crosspath (3-0-2) $4,455 $5,250 $5,675 $6,300 $3,119 $3,675 $3,973 $4,410

This upgrade's prices (or included crosspath's prices) are affected by the following MK: MilitaryConscriptionIcon Military Conscription, AdvancedLogisticsIcon Advanced Logistics, BetterSellDealsIcon Better Sell Deals



Razor Rotors provides some extra grouped popping power that the Heli Pilot may tend to lack in its earlier upgrades. Compared to other anti-lead options, Razor Rotors is quite expensive, but with the extra damage and faster popping it is quite effective as area-of-effect with mobility. Overall, the Razor Rotors upgrade offers an advantage of circular area-of-effect with mobility, excelling against early mid-game bloon rounds across a variety of moderate-to-long map formats without simultaneous lanes, such as Erosion, Bazaar, and Another Brick.


  • Razor Rotors is best used when not in Pursuit Mode. Instead, it is better off to micromanage the Heli Pilot by manually flying the Heli Pilot over the target bloons, especially Lead Bloons.
    • Compared to BTD5 Mobile, Pursuit Mode is not nearly as negative when paired with Razor Rotors. In BTD6, setting a Heli Pilot on Pursuit will make it follow just in front of the bloons.
  • Crosspathing for the Razor Rotors attack should only be considered for 3-2-0 as camo detection (especially Camo Leads) or 3-0-2 for general DPS. The rest is just for the dart attacks and general helicopter effectiveness.
  • On single-lane maps, a lone Razor Rotors can solo up to Round 40, non-inclusive, but may struggle against Ceramic rounds such as Round 43, Round 46, Round 47, and Round 49, even with the speed crosspath.
  • In Contested Territory, Razor Rotors excels on Least Cash and Least Tiers that have relatively short amounts of rounds. It especially excels on maps with only one active lane at a time, even on alternating lane maps such as Chutes and Bazaar.

Version History[]

Balance Changes[]

The strength of Razor Rotors was initially similar to how it was in BTD5 when it was first released in BTD6. It was buffed later on to improve its blade reliability when interacting with Pursuit targeting, and gained extra damage to make it more worth the price as an area-of-effect with mobility. Since Pursuit had previously felt counterintuitive for Razor Rotors, Pursuit was reworked exclusively for Razor Rotors to go much closer to the bloons. Speed of the rotor was increased to make the rotor attack a more reliable early mid-game carry across many map formats.

[...] On the opposite end of the spectrum, Pursuit Razor Rotors has underperformed due to distancing itself far too much, so we increased the range of this attack slightly.
~ Ninja Kiwi
  • BUFF Razor Rotors razor blade range increased (33 → 35)
Razor Rotors doesn't synergize well with it's own T2 and is kinda the dunce of T3 Helis
~ Ninja Kiwi
  • BUFF Razor Rotors blades deal more damage (1 → 2)
Previously Razor Rotor’s used to make the heli pursue for a further distance & this caused it to often fail to reach Lead Bloons with the rotor attack that could pop them. This overall seemed like a design flaw so that back-off distance has been moved up to the T4 instead.
~ Ninja Kiwi
  • Change Razor Rotors set on Pursuit now flies much closer to the targeted bloon in front. Does not apply to Apache Dartship or Apache Prime.
    • BUFF This is an overall buff to T3 Razor Rotors, whose main purpose is to utilize the razor rotor.
Even with the map-range advantage, rotors are weak compared to any other constant AoE circle like this. [...]
~ Ninja Kiwi
  • BUFF Razor Rotors rotor attack cooldown rate reduced from 0.75s to 0.5s
  • BUFF 3-0-2 Razor Rotors rotor attack will now gain 0.80x attack cooldown from the Faster Firing crosspath
Pursuit will now interact with Patrol Points in a limited 'pursuit between points', with this now you will be able to make your pursuit heli stay on one side on multi-path maps without getting stuck in the middle. Razor Rotors is fairly good now, but it could still justify a little more power given the weaknesses of the expensive upgrades that it builds into.
~ Ninja Kiwi
  • BUFF 3-0-x Razor Rotors rotors attack cooldown reduced from 0.5s to 0.45s
  • BUFF 3-0-2 Razor Rotors rotors attack cooldown reduced from 0.4s to 0.36s
  • BUFF Affected by Pursuit + Patrol Points enhanced algorithm addition

Bug Fixes and General Changes[]

Extra Notes (Version History)[]


Official artwork[]



  • In BTD6, the Razor Rotors Heli Pilot will intentionally tilt towards the bloons to shred bloons. Similar behavior occurs for Apache Dartship and Apache Prime.
  • The bloons are above the sharp rotors, yet the rotors can damage the bloons. A possible explanation for the capability to damage bloons could be that the rotors are very large and rapidly scrape the fragile layers of bloons.