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Annihilation ability: Destroys most Bloons completely and utterly within blast radius.
~ Official BTD6 description

Tech Terror is the fourth Path 2 upgrade for the Super Monkey in Bloons TD 6. It corresponds to the Technological Terror upgrade in BTD5. Along with x0.8 attack cooldown (+25% attack speed), +2 pierce, (9 total) and shooting green plasma balls instead of darts, it gains an ability to deal 2500 damage at up to 2000 bloons within the annihilation range (with a radius of 70), including Camos and Purples. Cooldown for the ability is 45 seconds. Main attack retains the critical hits system gained from Robo Monkey, every 15-20 shots gaining one critical hit inflicting 10 damage.

It costs $16,150 on Easy, $19,000 on Medium, $20,520 on Hard, and $22,800 on Impoppable.



Tech Terror upgrades into a fully robotic monkey. The robot has various fuel-infused pipes and internal construction that fuels the entirety of itself. Replacing its formerly bionically enhanced arms is a pair of arms that now act as plasma cannons. Tech Terror's head, while having the appearance of a monkey's head, is entirely mechanical; its head has the two fuel-infused pipes connecting from its head to its arms, its face is colored grey, has red circular eyes, and a wide grinded frown.

Tech Terror shoots green plasma balls through both of its arms. When its Annihilation Ability is activated, it produces an immediate pulse of green, accompanied with a robotic voice expressing its energy.

Adding Path 1 crosspaths obscures the Tech Terror's eyes with goggles that correspond to each Path 1 upgrade. Adding Path 3 crosspaths simply add orange stripes, one in the center for Knockback, or two stripes, one on each side, for Ultravision.


Alongside all the unique functionality of its preceding upgrade, Tech Terror receives +25% attack speed (0.8x attack cooldown, or 0.048s), +2 pierce (9 pierce), Plasma type, (popping all Bloon types save Purples) and the Annihilation ability.

The Annihilation ability, when activated, generates a 70 radius blast that deals 2500 damage to up to 2000 bloons in range, regardless of their properties, (it pops Camo and Purple) on a 45 second cooldown.

Targeting Priorities[]

Tech Terror's main attack has two independently targeting attacks that each shoot projectiles. These projectiles move straightforwardly.

  • First: Targets the first bloon visible within its range.
  • Last: Targets the last bloon visible within its range.
  • Close: Targets the closest bloon visible within its range.
  • Strong: Targets the strongest bloon visible within its range.

Tech Terror, just like Robo Monkey, has a secondary targeting option called Alternate Arm, which allows for two simultaneous targeting priorities at any given time. This is controlled by a second targeting setting above the original targeting setting. However, both arms cannot be set on the same targeting priority, and one setting must be changed into a different priority before the other setting can be changed into the desired targeting priority.

Tech Terror's annihilation blast, while arbitrarily high, defaults on Close relative to the robot.

Tech Terror can access the Camo Prioritization targeting priority if given the 0-4-2 crosspath, which when set allows the Tech Terror to prioritize Camo Bloons before any other bloon type.



Tech Terror's Annihilation Ability is a valuable option for countering extremely clumped bloons. Annihilation Ability deals enough damage to wipe out Fortified BFBs and Fortified DDTs, both of which pose significant problems on Round 98 and Round 99, respectively. In terms of support, Village discounts for saving money when buying Robo Monkey are useful, and slowdown helps let the ability be chained to blast out more bloons in a single use. Stalling the ability is also helpful; don't blast too many bloons at once, and try to leave only a few bloons left so the ability can recharge further.

Its main attack only gains more pierce and attack speed in addition to popping Frozen and Leads in exchange for not popping Purples, only contributing a little bit to the Tech Terror's overall value. The bonus pierce and attack speed is mainly valuable for the mid-game, although the 0-4-2 crosspath allows affected bloons to become more clumped so that its ability can subsequently be chained together. In any case, still try to make use of its reasonably decent DPS, as it still is effective against weaker blimps and Super Ceramics even in the late-game.

Compared to Sun Avatar, which costs a little less than Tech Terror overall, Tech Terror has lower synergy potential, specifically when interacting with Alchemist buffs and Monkey Commerce discounts, but is compensated by its immense solo grouped popping power.


  • 2-4-0 Tech Terror is generally better for the +2 pierce and double attack speed, though 0-4-2 is good for the knockback power of the Knockback upgrade and camo detection from Ultravision.
    • Knockback can help clump up bloons together, to maximize potential for the Annihilation Ability.
  • Note that upgrading to Tech Terror prevents the Super Monkey from popping Purples without support, unless further upgraded to The Anti-Bloon. Be sure to provide backup defense against Purples, especially Camo Purples.
  • The Annihilation Ability is enough to entirely destroy up to Fortified BFBs in a single use. This can be utilized to deal with Round 98, but watch for the ability cooldown.
  • Clumping up the bloons helps with chaining Tech Terror ability at a denser group of bloons, making more use out of the ability. Slowdown supports such as Bloon Sabotage, MOAB Glue, and the Knockback upgrade help fulfill this role.


  • [version unknown] If the Tech Terror's ability is used on the children of regrow bloons, (etc. zapping a rainbow bloon regrowed from another rainbow bloon's children) it will grant extra cash despite regrowed children bloons normally not giving cash. [unfixed as of 25.1]
  • [28.0] x-3-0 Robo Monkey and later were granted the Camo Prioritization option even though they cannot detect camo without Ultravision. Affects Tech Terror. Patched in 28.2.
  • [31.0] 2-4-0 Tech Terror is bugged on this update to shoot more than one projectile per arm. Fixed in 31.1.


Not Lacking Critical Information
FIRST RELEASED: Version 29.0
Description: Get 25,000 Critical hits

Version History[]

Tech Terror had seen competition with Sun Avatar due to Tech Terror's dependence on abilities and not having a much improved main attack. It has been buffed in many updates to increase its usefulness compared to Sun Avatar. In Version 27.0, its power has been greatly increased overall to counter competition of other high-pierce area options such as the Ground Zero ability.

  • Buff Ability radius increased (40 → 60).
  • Buff Projectile pierce increased by +2 (due to the Epic Range and Robo Monkey pierce buffs).
  • Buff Projectile speed increased by 25% from the Epic Range upgrade.
We were finally able to properly implement a popular suggestion for the Robo Monkey, and will be keeping an eye on it's [sic] performance more closely in this update. [...]
~ Ninja Kiwi, referring to Robo Monkey
  • Buff Tech Terror can now use separate target priorities on both arms.
[...] Additionally middle path has received some basic buffs with Robo-Monkey feeling unbalanced for the high price and difficult crosspathing, and Tech Terror not keeping up with other towers that perform a similar role.
~ Ninja Kiwi
  • Buff Affected by price drop of Robo Monkey.
  • Buff Tech Terror ability cooldown reduced (60s → 45s).
While not considered an issue on the same level for Races, the Bloon Annihilation ability has preemptively had pierce reduced under the same reasoning as Ground Zero and Maelstrom, but by amounts that still likely won't be noticeable even under most Race conditions - but we're keeping an eye on it. Additionally the price of this upgrade has been reduced by a fair amount.
~ Ninja Kiwi
  • Buff Tech Terror now costs less ($22,000 → $19,000).
  • Nerf Tech Terror ability now has less pierce (infinite → 2000).
Robo Monkey has never filled the super effective role it held in BTD5, so Dr Monkey has installed updated HUD targeting systems that now deal occasional critical hits. Additionally as the abilities on this path didn't match up to their history or other Monkey Tower options (like Ground Zero) so they have been improved significantly in damage and increased radius.
~ Ninja Kiwi
  • Buff Tech Terror is now able to deal critical damage on its hits
    • Buff Criticals occur every 20 shots within the 15th-20th shot
    • Buff Criticals deal a damage increase from 1 -> 10
  • Buff Tech Terror Bloon Annihilation ability damage increased from 1000 -> 2500
  • Buff Tech Terror Bloon Annihilation ability radius increased from 60 -> 70
Robo didn't need to lose pierce in the last Super Monkey T2 rework, and Dark Knight feels like it has too much pierce without ever considering the pierce crosspath. So to balance these together we've taken out pierce from Dark Knight and added it back into x2x carrying up into Robo Monkey. [...]
~ Ninja Kiwi, referring to Path 2 balancing
  • Buff Tech Terror base pierce increased (8 --> 9)


When relogging into a game having Tech Terror:

When activating Annihilation Ability:


Official artwork[]


  • In Bloons TD 6, its green plasma ball turns blue when above water. The Annihilation green ring remains green above water.
  • It is possible to win with 4 Tech Terrors in CHIMPS Mode. Along with placing the Super Monkeys within range of multiple Monkey Commerces to afford the Robo Monkey upgrades sooner, the hero Pat Fusty is used. This was even possible before Robo Monkey gained a substantial price cut in Version 22.0. An example can be found here.
  • Tech Terror is the only Tier 4 Super Monkey to ever cost less than $20,000 for the upgrade cost alone, as previous games including Bloons TD Battles Mobile feature a higher upgrade cost for its corresponding earlier counterpart, Technological Terror.
  • Ninja Kiwi states that the Tech Terror's robotic suit is constructed by Dr. Monkey in their February 18, 2022 blog.