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Shoots incredibly fast.
~ In-game description

Overdrive is the fourth upgrade of Path 3 for the Tack Shooter in Bloons TD 6. It attacks three times as fast as Tack Sprayer and pop up to two bloons per tack (three with 0-2-4) instead of one. This makes them good low-cost choices for popping MOAB-class against tight corners, and improves its overall performance against grouped bloons. By default, it attacks every 0.35s, almost three times per second.

This upgrade costs $2,720 on Easy, $3,200 on Medium, $3,455 on Hard, and $3,840 on Impoppable.



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This upgrade is taller than its predecessor, re-adding a base that is silver colored. The main body colors that were red are now dark gray, and has a flanged extension connecting to the silver base. The top ring's color changes from dark gray to silver, the emblem on top changes from black to red and gains two additional lines to make a cross. The end of the barrels all glow red. The instamonkey icon's top emblem has black crossed tacks instead of red cross tacks. The upgrade portrait depicts an Overdrive shooting a spray of tacks.

When Path 1 upgrades are bought, the red tack icon features additional tacks, and the tacks in the icon face downwards with no crossing. When Path 2 upgrades are bought, Long Range Tacks flattens the top of the Tack Shooter, while Super Range Tacks mounts the Tack Shooter with a taller base.

Overdrive attacks three times as fast as a Tack Sprayer, attack cooldown reducing to 0.35s by default (0.263s with 1-0-4, 0.197s with 2-0-4). In addition, it gains +1 pierce, for 2 pierce by default. Range remains at 23 at base.

Targeting Priorities[]

Overdrive shoots a spray of projectiles in an radial spray. Technically, the Tack Shooter is locked on the Close targeting priority. However, for simplicity reasons, Overdrive has no targeting priorities.

Full Popology[]


Updated as of Version 39.2
Base stats
  • Tacks:
    • Projectile, sharp type, 16 per shot, 23 range, 0.35s attack cooldown, 1 damage, 2 pierce.
Crosspathing interactions
  • 1-0-4:
    • Attacks faster, 0.2625s (-25%) instead of the initial 0.35s.
  • 2-0-4:
    • Attacks even faster, 0.196875s (-25%) instead of 0.2625s from the previous 1-0-4.
  • 0-1-4:
    • Base range increased to 27 (+4).
  • 0-2-4:
    • Base range increased to 31 (+4).
    • Tacks gains an extra +1 pierce.
Monkey Knowledge interactions

Attack Interactions[]

See also: Attack Interactions/Bloons TD 6/Primary
Updated as of Version 27.3
Base attack(s)
  • Tacks:
    • Sharp Type (pops Black, White, Purple) Sharp
    • Orbital Spray (spray of 16) Orbital Spray (16)
    • Straight Attack Straight Attack


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 (X-X-4) $2,720 $3,200 $3,455 $3,840 -
Total (0-0-4) $3,510 $4,130 $4,460 $4,950 $2,457 $2,891 $3,122 $3,465
Crosspath (1-0-4) $3,635 $4,280 $4,620 $5,130 $2,545 $2,996 $3,234 $3,591
Crosspath (2-0-4) $3,890 $4,580 $4,945 $5,490 $2,723 $3,206 $3,462 $3,843
Crosspath (0-1-4) $3,595 $4,230 $4,570 $5,070 $2,517 $2,961 $3,199 $3,549
Crosspath (0-2-4) $3,785 $4,455 $4,815 $5,340 $2,650 $3,119 $3,371 $3,738

This upgrade's prices (or included crosspath's prices) are affected by the following MK: ComeOnEverybodyIcon Come On Everybody!, BetterSellDealsIcon Better Sell Deals



Overdrive is comparable to other early-to-mid game towers due to its relatively low-cost but high projectile count allowing it to benefit immensely from various stat buffs, especially Alchemist buffs. It especially prefers combinations of debuffs (e.g. Embrittlement) and damage buffs (e.g. Berserker Brew, Stronger Stimulant, and Jar of Pickles), which greatly utilize the vast amounts of projectiles it produces per shot at very fast rates.

Compared to other towers serving a similar role, Overdrive is more placement-dependent, as it has short range and prefers curves and areas where it can be placed below the track to allow it to hit more bloons. It also has better MOAB damage in exchange for slightly worse bloon popping power and lack of camo detection.


  • Overdrive with the first path upgrades (Faster Shooting and Even Faster Shooting) is usually the better crosspath than the second path (Long Range Tacks, Super Range Tacks) as the attack speed improves the consistency and damage of its attacks.
  • If the Overdrive is placed so tightly near the track such that the origin of the tacks coincides with the track, players can use these to greater effectiveness. It is especially effective on MOAB-Class Bloons because they have large hitboxes, allowing most of the Overdrive's tacks to hit.
  • Overdrive has an extremely important and useful synergy with Stronger Stimulant as Overdrive benefits greatly from all of its bonus stats due to its high projectile count. Before purchasing the 4th Tier, Berserker Brew can be used too, though a 2-0-4 Overdrive only allows 44.7% uptime (62.2% with 3-2-0 Alch) due to expiring within 3.58s (5.00s with 3-2-0 Alch), assuming no other attack speed buffs were added on top of the Tack Shooter.
    • With 4-0-X Stronger Stimulant, the buff lasts for up to 5.4s on a 2-0-4 Overdrive, 67.5% uptime, assuming no other attack speed buffs are added to the 2-0-4 Overdrive on top. However, if the Overdrive is the only buffable tower within range, then it gains just over 100% uptime.
  • An Overdrive's "death zone" is centered where the centerpoint of the central body would be positioned. The "death zone" is the point where all 16 tacks will spawn from, since tacks actually spawn from a single point rather than directly out of each of the Overdrive's visual barrels. To find the "death zone" of this Tack Shooter, look for the y-axis position of its middle barrels and locate the circle's center from there.[1]
  • Overdrives work very well in Boss Bloon Events against any boss but Vortex (which stuns nearby towers), as they offer extremely high DPS for a low cost, especially when paired with Embrittlement, Super Brittle, and Glue Storm. For Tier 1 Bosses, multiple Overdrives are a more efficient investment than The Tack Zone. For later tiers, pair Overdrives with The Tack Zone, Permanent Brew, and Support Sun Temples to maximize close range DPS.

Version History[]

Balance Changes[]

Overdrive attacks a lot faster than it did when it was first released, but the price has increased slightly to accommodate the much greater attack speed. It is now a popular option for synergizing with tower buffs and bloon debuffs, especially Berserker Brew and Embrittlement, and is popularly used for beating MOAB-class bloons including Bosses.

While not directly nerfed in v36.0, a targeted nerf to the Even Faster Shooting upgrade has indirectly nerfed 2-0-4 Overdrive, the most popular crosspath of Overdrive for its cost-efficient highly buffable single-target damage.

  • BUFF Base attack speed increased (0.6s → 0.525s), as a result of the base Tack attack speed buff
  • BUFF Overdrive attack speed bonus increased (x2 → x3)
  • NERF Overdrive cost increased ($2500 → $3200)

Bug Fixes and General Changes[]

Extra Notes (Version History)[]

  • In the patch notes of Version 12.0, it was claimed that Overdrive's attack speed bonus was increased to 66%. What was actually implied was that the attack cooldown was reduced to 33% of the Tack Sprayer's attack cooldown instead of 50%, not that the Overdrive now has an attack speed rate 66% faster than normal.


Official artwork[]



  • This upgrade is the only Path 3 Tack Shooter upgrade that does not involve directly increasing the number of projectiles per attack.
  • This upgrade is one of few upgrades that attacks exactly 3x faster than their predecessors, the others being Semi-Automatic, Glue Hose, and Artillery Battery.
  • This upgrade resembles the "hypersonic tack shooter" glitch from Bloons TD 1, however, this is likely a coincidence.
  • The upgrade icon for Overdrive displays 8 tacks instead of 16.
  • The Overdrive price nerf in Version 13.0 was done exactly as how MOAB Glue was price nerfed in Version 4.0.