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Update 2.0 - Featuring exclusive content!

Get ready for a brand new exclusive tower - the COBRA, also known as Covert Ops Battles Response Agent. Armed with a very particular set of skills and trusty sidearm, the COBRA can affect the course of a game in many different ways. Good luck.

~ Ninja Kiwi's Apple App Store update description

COBRA (Covert Ops Battles Response Agent) is a tower appearing in Bloons TD Battles Mobile, including Steam and Microsoft Store counterparts. It was added in the update on August 18, 2014. The tower costs Medallion Icon5000, tallying the third most medallions to get an item in BTD Battles, only overcome by the Silver and Golden weapon skins. However, it can be bought for USD $4.99 or equivalent (still more than all the other towers, for USD $3.99). Winning battles in Battle Arena is essential to be able to afford the tower, given the classic mode's rewards are only a fraction of the cost of the tower.

Its upgrades are generally focused on changing game mechanics in ways that were previously impossible. However, it must be used in combination with good grouped popping power and camo popping power as it possesses neither. Also, it is sometimes banned in Bananza Battle Arena.

Upgrades[]

Path 1[]

Wired Funds Icon BTDB
Wired Funds
COST: $400
Description: You gain +70 extra money per round.
Effect: Generates $70 at the end of each round.
Bloon Adjustment Icon BTDB
Bloon Adjustment
COST: $650
Description: Every 5th neutral Bloon on opponent's side is randomly given regen, camo or +1 rank. (Max Ceramic)
Effect: Every 5th naturally spawning bloon that comes from the opponent's side will randomly be given camo, regrow, or +1 rank, up to Ceramic.
Monkey Stim Icon BTDB
Monkey Stim
COST: $400
Description: Decreased Tower Power cooldown by 5 seconds (min 15 seconds).
Effect: Reduce Tower boost cooldown by 5 secs.
Offensive Push Icon BTDB
Offensive Push
COST: $1,750
Description: Next tier of Bloons becomes available to send 1 round earlier than normal.
Effect: All bloon sends, except Regrow and Camo modifiers, get to be sent 1 round earlier than normal.

Path 2[]

Double Tap Icon BTDB
Double Tap
COST: $325
Description: Doubles COBRA's attack speed.
Effect: Gains two guns, doubling the attack speed of the COBRA.
Attrition Icon BTDB
Attrition
COST: $600
Description: Every 15 seconds, either: Steal 2 lives from opponent (assault mode), or add 2 lives (defend mode)
Effect: Every 15 seconds, the COBRA will steal either 2 lives from opponent (assault mode) or gain 2 lives (defensive mode). Opponent lives can only be drained down to 1 life. If opponent has 1 life left, Attrition will not kill the player but instead reward $30.
Finish Him Icon BTDB
Finish Him!
COST: $400
Description: Decrease Bloon Power cooldown by 10 seconds (min 10 seconds).
Effect: Reduce Bloon Boost cooldown by 5 secs.
Misdirection Icon BTDB
Misdirection
COST: $3,500
Description: Moves highest Bloon in range to your opponent. Cooldown varies based on Bloon type. (Max BFB). [sic]
Effect: Strongest bloon (up to BFB) within range of the activated COBRA moves onto opponent's natural spawn entrance. Initial cooldown of 15 seconds, and cooldown for sent bloon varies depending on tier.

Total Costs[]

Strategies[]

Main article: COBRA/Strategies

Version History[]

The COBRA is capable of highly influencing the outcome of a game. Ever since the COBRA was added to the game, it has almost always been nerfed in updates. Most of these nerfs are to some of its most powerful upgrades.

The only popular loadouts that uses the COBRA right now is COBRA-Bomb-Mortar and COBRA-heli-farm. Previously Boomerang-Village-COBRA and Dart-Farm-COBRA (way back before 3.1) were popular but both eventually fell out of use due to unknown reasons.

3.1
  • NERF If the opponent has only 1 life left, another Attrition will not kill the opponent, but instead, give the player $30.
3.2
  • NERF Bloon Adjustment price increased ($350 → $500).
3.5
  • BUFF Misdirection ability can now target camo bloons.
4.3.1
The COBRA has always been a popular tower, but we've seen an increase in use-rates over the past few weeks, with its Bloon Adjustment upgrade being an extremely popular win condition. This price bump should make it a little more difficult for players to spam 2-0 COBRAs. We've also increased the cost of the Misdirection upgrade to make stacking the ability a little more difficult.
~ "BTD Battles 4.3.1 Update Balance Changes"
  • NERF Bloon Adjustment Price increased ($500 → $550).
  • NERF Misdirection price increased ($3250 → $3500).
4.6
We think it's close to being just right, but might still be a little too powerful. A decrease in attack speed should mean it'll require support towers to hold off early rounds/rushes, making it more difficult to spam. We've also doubled the initial cooldown for the Misdirection ability as it's just too valuable at the moment.
~ "BTD Battles 4.6 Update Balance Changes"
  • NERF Overall attack speed decreased by 10% (1.000000s → 1.111111s).
  • NERF Initial cooldown of Misdirection increased (10 seconds → 20 seconds).
6.9
  • NERF Bloon Adjustment cost increased ($550 → $650)
6.13
  • NERF Wired Funding end-of-round cash decreased ($80 → $70)
6.17
  • BUFF Misdirection cooldown versus BFB decreased (90s → 60s)
6.18
  • BUFF Misdirection initial cooldown reduced (20s → 15s)

Gallery[]

Trivia[]

  • The COBRA is the most expensive tower to unlock in BTD Battles, costing Medallion Icon5000.
  • This tower is the first in Bloons TD Battles where all upgrades are unlocked with the purchase of the tower.
  • This is the only tower in Bloons TD Battles that can affect an opponent's side of the track.
  • Misdirection is the only ability that has varying countdown times.
  • The COBRA and the Banana Farm are the only 2 BTDB towers that don't have an upgrade that allows it to pop Lead Bloons.
    • However, since Banana Farms cannot pop bloons at all, the COBRA is the only attacking tower that can't pop Leads.
    • Misdirection can send back Leads, but not pop them.
  • Normally, players would get Medallion Icon7 if you finish a game with 150 lives. However, if players lost some lives and used Attrition to get lives back to 150, players would not get Medallion Icon7. The same applies to Support Chinook.
  • It is the fifth tower that holds any type of gun by default, the first being Glue Gunner and the second being Dartling Gun and the third being Sniper Monkey and the fourth being Monkey Engineer.
    • Since the Glue Gunner doesn't do damage initially, it is also the fourth gun-wielding tower that uses Sharp damage by default.
  • This is one of the only two towers that can regain lives without using premiums, the other being the Heli Pilot.
  • Sometimes, if both players have the COBRA, one of them will attempt to reduce the opponent's lives to 1 (kill their opponent before version 3.1) by having more 0/2 COBRAs than the other. This is known as an "Attrition War".
  • Offensive Push only affects the bloons, and not Regen or Camo modifiers.
    • For example, if one gets Offensive Push on level 11, the player will only get grouped blacks and spaced rainbows without the Regen and Camo modifier.
  • The COBRA's hair gets less messy as players upgrade it.

Ninja Kiwi[]

  • According to Ninja Kiwi's December 3rd 2021 blog, Ninja Kiwi confirmed that COBRA and Bloonchipper will not return in Bloons TD Battles 2.
    • Prior to this, NK made a vague statement about COBRA's potential addition after initial release of that game.
  • According to Ninja Kiwi's 14th April 2022 blog, COBRA is not going to return to Bloons TD Battles 2. However, they did state that they could design a tower that evolves from COBRA, which would be designed better fit for Battles 2 game mechanics and would also be not buyable as an in-app purchase.
    • As of 20 April 2023, Agent Jericho has been revealed to be a Hero that will fulfill the COBRA's role in Battles 2.

Cultural references[]

  • Cobra means "snake" in Portuguese.
    • The cobra is also a kind of snake known to be highly venomous.
  • The name COBRA could possibly be a reference to Solid Snake of the Metal Gear Solid video game series.
  • The name COBRA could also be a reference to the German television series Alarm für Cobra 11.
  • The "Finish Him!" upgrade is a reference to the phrase "Finish Him!" from Mortal Kombat.
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