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Concentrates a powerful beam of energy to a single point.
~ In-game description

Plasma Accelerator (sometimes shortened to Paccel or Accel) is the fourth upgrade of Path 1 for the Dartling Gunner in Bloons TD 6. Instead of launching individual projectiles, it now fires a concentrated beam of plasma energy at wherever the cursor is located or the player last tapped. Bloons that cross the beam itself take damage, while the endpoint of the beam deals extra damage to Bloons. The endpoint pierces more if the whole laserbeam has remaining pierce. Plasma Accelerator gains the plasma damage type, so it can now pop Lead Bloons, but still does not pop Purple Bloons. Plasma beam is a laserbeam 2 units wide, focal point is a radial AoE of 4 units radius, the dimensions increased by +50% with 4-0-2.

The laser beam itself deals 1 damage every 0.20s contact and up to 50 pierce (75 pierce with 4-0-2). At the end point of the beam, it deals 2 damage every 0.20s contact, +10 versus MOAB-class. Any leftover pierce from the beam is transferred into the endpoint to produce endpoint damage. The endpoint will only activate if the laserbeam has not reached its pierce limit, not hit any Purple Bloons, or does not hit an obstacle. An active endpoint is indicated by visible bubbling yellow plasma at the very end of the beam. The endpoint extends to the maximum distance that the beam can travel, and thus the beam will only go as far as the Dartling is aiming.

In addition, the Laser Shock effect lasts for 5 seconds instead of 2 from Laser Cannon. Both the laser beam itself and the end point can apply the Laser Shock effect.

This upgrade costs $9,435 on Easy, $11,100 on Medium, $11,990 on Hard, and $13,320 on Impoppable.



Plasma accelerator ingame

Plasma Accelerator

Plasma Accelerator's appearance changes significantly compared to the previous upgrade, Laser Cannon, doing away with the laser emitter for a golden plasma launcher with a red point, various red lights, and a red tube linking to the rear of the gun. As the monkey shoots with this new weapon, a plasma accelerator, the gun shakes up and down to the recoils of the powerful plasmatic energy surging out via a laserbeam. The monkey can increase and decrease the length of the laserbeam at will if the player adjusts the distance between the gun and its laserbeam's endpoint.

The monkey now wears an all-red full body suit, retaining the green visor, with gold bands around its wrists and ankles, expanding the emblem on its forehead to have wings, and adding golden circles on either side.

Crosspathing with path 2 turns most of the launcher purple, then the remaining golden parts green. Crosspathing with path 3 shortens the launcher, mounts it on a tripod with two silver bands, before painting those bands blue and adding gold stripes along the sides of the monkey's head.

Plasma Accelerator converts the tower to firing a laserbeam that deals contact damage every 0.2 seconds and ends in a point that deals extra damage; the main beam's damage remains at 1, with 50 pierce, while the point deals 2 damage, 10 to MOABs, and uses any pierce not consumed by the beam. The beam itself is also plasma type, popping any Bloon type except Purple Bloons. Both the beam and the endpoint are able to apply an improved Laser Shock, lasting 5 seconds and granting +1 damage to Plasma Accelerators and higher. The endpoint does not appear if the Plasma Accelerator caps its beam's pierce or the beam contacts a Purple Bloon.

Powerful Darts grants Plasma Accelerator +25 pierce rather than +2; it also increases beam width from 2 to 3 and end point size from 4 to 6.

With the Cross the Streams MK, having two Plasma Accelerators' beams intersect generates a plasma pool every 1 second where the beams cross; these pools deal 1 damage to up to 5 Bloons and apply Laser Shock for 2 seconds.

Targeting Priorities[]

Plasma Accelerator customly aims based on direction and angle of where the Dartling points towards. It continously produces a laserbeam controlled in a aim-based mobile style guided by touch-based mobility. The laserbeam consists of a rectangular contact area with a radial area of effect at the endpoint.

  • Normal: Rotates towards the direction of where the player last tapped. On desktop versions, always rotates towards direction of the cursor inside the game.
  • Locked: Locks the Dartling in place. By default, locks at center of map, but can be adjusted in the same way as a Mortar Monkey. On desktop versions, using a hotkey to switch to Locked will default to wherever the mouse currently is pointing.

Since all Dartlings already attack based on custom aim, Dartlings don't receive Camo Prioritization even with Advanced Targeting.


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 (4-X-X) $9,435 $11,100 $11,990 $13,320 -
Total (4-0-0) $14,275 $16,800 $18,145 $20,160 $9,993 $11,760 $12,702 $14,112
Crosspath (4-1-0) $14,485 $17,050 $18,415 $20,460 $10,140 $11,935 $12,891 $14,322
Crosspath (4-2-0) $15,290 $18,000 $19,440 $21,600 $10,703 $12,600 $13,608 $15,120
Crosspath (4-0-1) $14,400 $16,950 $18,305 $20,340 $10,080 $11,865 $12,814 $14,238
Crosspath (4-0-2) $15,420 $18,150 $19,600 $21,780 $10,794 $12,705 $13,720 $15,246

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



Plasma Accelerator is a relatively powerful tower for its cost, and particularly excels in pre-Freeplay rounds if micromanagement of its beams are utilized optimally. As the main source of damage is now concentrated in a small area, considerable micro is required to use this tower at its full potential. However, the tower becomes less effective during Freeplay Rounds when Super Ceramics start to appear, mostly acting as a supportive blimp damage dealer on those rounds. Paccel tends to struggle at beating Super Ceramics, so it is recommended to get other towers that can deal with them and stronger blimps.


  • The Plasma Accelerator is quite effective at beating the first 80 rounds, but it is quite ineffective late-game.
    • Note that for it to fully be used for these 80 rounds, it would still require considerable micromanagement and support, especially on harder maps with less straight lines and/or shorter tracks.
  • A Plasma Accelerator that only uses its beam is very inefficient but can still deal some damage on long straight paths.
  • 4-2-0 Plasma Accelerator is more effective than 4-0-2, as the attack speed does make it pop up bloons at a faster rate. Occasionally, players may choose to go for 4-0-2 to make it easier to micromanage with the faster swivel speed, in addition to a larger beam.
    • 4-0-2 has the special benefit of gaining +25 pierce instead of just +2, but the pierce bonus is still rather small.
  • If the player owns the "Cross the Streams" MK, when two Plasma Accelerator beams cross, small puddles of plasma are continually created. A puddle is spawned roughly once per second of contact. Each puddle can pop 5 bloons once, applying a plasma status effect to each bloon which pops two additional layers over time, similarly to an Alchemist projectile. The puddles can pop camo bloons even if neither Plasma Accelerators have camo detection.
  • Two Plasma Accelerators used together can easily solo a BFB, given sufficient micro.
  • When going for taking out heavy health blimps instead of rushes of Regrow Rainbows, stacking several Plasma Accelerators can rapidly overpower big bloons.
  • If the Plasma Accelerator's beam hits any Purple Bloon along the way, it will stop at the Purple Bloon and therefore not penetrate through it until the Purple Bloon moves away.
  • For Boss Events, Plasma Accelerator can be a good long-range option for damaging bosses. Damage wise, it can deal about ~17% more DPS than Full Auto Rifle, assuming all debuffs and non-hero buffs are applied. It is however typically worse than Full Auto Rifle on many fronts unless Elite Sniper is banned for multiple reasons: Plasma Accelerator takes up more footprint, costs more, and requires manual input for best results. It is similarly weaker than 0-2-4 Bloon Area Denial System or Armor Piercing Darts in terms of damage. That being said, on weeks with limited Snipers, it is still better than any spammable alternative, save for AP Darts and BADS.

Version History[]

Balance Changes[]

Not including the bug where the beam dealt +10 MOAB-class bonus damage, Plasma Accelerator got buffed overall. In a few updates, its beam now applies Laser Shock and the Plasma Accelerator attack has gained an increased attack rate.

22.0 (Dartling Gunner update)
  • Initial release.
As our most recently added tower we are very happy with all the excitement surrounding this beloved monkey tower and the general middleground play position. We're happy enough with its time in the wild to make some first impression changes here which we hope you'll continue to enjoy.
~ Ninja Kiwi, referring to multiple Dartling upgrades
  • BUFF Plasma Accelerator can now apply Laser Shock with the beam as well as focal point.
  • BUFF [Undocumented] Plasma Accelerator's beam now also deals +10 MOAB-class damage.
  • NERF Plasma Accelerator's beam no longer deals +10 MOAB-class damage.
[...] Plasma Accelerator attack delay has been buffed so that now the beam 'tic rate' matches the attack speed at tier 3, overall giving it a 20% buff to all DPS which carries on up to the Tier 5. [...]
~ Ninja Kiwi, referring to buffing both Plasma Accelerator and Ray of Doom
  • BUFF Plasma Accelerator attack rate increased (0.25s → 0.20s).
  • BUFF 4-0-2 Plasma Accelerator focal point size increased from 4 -> 6
  • BUFF 4-0-2 Plasma Accelerator beam width increased from 2 -> 3
    • [bug] Visually the beam doesnt change size.
Laser Cannon is not a great stepping stone for Plasma Accelerator, we think these are ok though so adjusting prices between them slightly. [...]
~ Ninja Kiwi
  • NERF Plasma Accelerator price increased from $11,000 to $11,100
    • Overall price change is $0, as Laser Cannon costs $100 less.

Bug Fixes and General Changes[]

Extra Notes (Version History)[]


Official artwork[]



  • Plasma Accelerator's attacks kind of resembles a weaker BTD5 Ray of Doom except its laserbeam has a focal point where it ends.
  • Although the Plasma Accelerator's beam is unable to penetrate through Purple Bloons, the graphics for the beam are not yet adjusted to accommodate this feature.
  • With 4 letter a's, this upgrade has the most number of letter a's for a Dartling Gunner upgrade.
  • In the Dartling Gunner teaser, Plasma Accelerator is the first Tier 4 Dartling to be revealed in the trailer.
  • In Version 23.0, although not stated, the Plasma Accelerator's beam also dealt +10 MOAB damage. Ninja Kiwi stated this to be a bug, and it has since been patched as of Version 23.2. This makes it the first actual nerf to the Dartling Gunner in BTD6 history.
  • In one of the Dartling Gunner concept artworks, Plasma Accelerator resembles closely to the Bloon Liquefier except the conceptual gun resembles a steampunk-styled gun, the mini-tanks on the handheld gun are replaced with tall lightbulbs, and the operator has singular red stripes.