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Absorbs all nearby Banana Farms and their income, freeing up space for new Monkeys.
~ Bloons TD 6 description.

Monkeyopolis is the final upgrade of Path 3 for the Monkey Village in BTD6. Once bought, it sacrifices all non-Tier 5 Banana Farms within its radius and in turn generates its own far superior income generation. Instead of having a single price, the cost increases for every Banana Farm in its radius. It cannot be bought in Deflation Mode and C.H.I.M.P.S. as Banana Farms are disabled by default, unless in a special challenge that enables Banana Farms.

It costs $5000 per Banana Farm regardless of difficulty, the $5000 minimum being the cheapest Tier 5 upgrade cost in the game. However, a visual bug displays wrong prices (see Bugs). With only one Banana Farm in its radius, it is the only Tier 5 upgrade that has a base cost of less than $10,000.


Monkeyopolis upgrades the building into a much larger, more developed town hall with a few huts surrounding it. The Monkeyopolis' clock in-game moves based on your device's time. Just like with Monkey City, on every 5th minute, the minutes hand changes position, and the same applies to the hours hand.


  • The price of the upgrade increases by $5000 with each Banana Farm in its radius.
  • The total income generated by the Monkeyopolis per round is one $300 crate every $2000 spent on farms, including difficulty prices. The value of each crate starts increasing if 10 crates have been reached.
  • The Monkeyopolis will always produce at least one crate.
  • Monkeyopolis cannot absorb Tier 5 Banana Farms.



While the sacrifice of all the Banana Farms is quite extreme given both the cost of the upgrade and the lost money that could have been reclaimed when selling each Farm individually, Monkeyopolis releases massive amounts of money. Not only does it increase farm production vastly, it is also is able to comfortably compress up to 8-10 farms into the space of a single village's range. While on most maps, there is not enough space to place that many farms, it is still extremely powerful with few farms sacrificed to it. The main issue with Monkeyopolis comes with the fact that its role is usually largely unneeded. High-tier farms are usually not needed on late-game runs due to the fact that money rarely runs out after the initial farming. Furthermore, the Sun Temple and True Sun God provide a lot of money with their support sacrifices already, and are already the main pushing force of late game.

However, Monkeyopolis can be pivotal in Boss Battles. This is since the game mode requires farming to be as quick and optimal as possible, making Monkeyopolis no longer redundant.


  • 4-2-0 Banana Research Facility is the best sacrifice for each Banana Farm, as it is the most expensive farm that can be sacrificed to Monkeyopolis.
  • It is usually adequate to have around $50K worth of sacrifices, which would give $5000 per round from 10 $500 crates, but sometimes it is worth spending much more on sacrifices if there is very limited space for Banana Farms, such as on Co-Op Mode.
  • Monkeyopolis is one of the best single-tower income methods in the game. It is especially useful for aiming to earn the Bill Greates achievement on Co-Op Mode, as a Monkeyopolis plus either Banana Central + BRF spam or Monkey Bank spam will ensure maximum income generation such that it would be possible to save up $2,500,000 for donating $500,000 to a single player at once.
  • Despite producing crates in a manner similar to a Banana Research Facility, it is still considered a Monkey Village by the game’s code. As such, Monkey City, Overclock, and Ultraboost do not directly increase the income of the Monkeyopolis. However, the extra range from an Overclock and potentially a Monkey Village can allow more Banana Farms to be integrated into the Monkeyopolis when upgrading to it.


  • When the Monkeyopolis is initially bought, it will display the wrong price with difficulty price changes applied to the displayed cost, but is only visual and the upgrade actually still costs the same. The bug reverts to normal after the player leaves the upgrade screen and reenters the upgrade screen. This bug is known to occur in 14.0.
  • There was a glitch where the Monkeyopolis upgrade is free when another Monkey City is bought without any Banana Farms near it as the price is determinant on how many farms are near it and is universal dependant on the Monkey City with the least amount of Farms near it (0 meaning all Monkey City can be upgraded into a Monkeyopolis for free). This has been patched as of July 2018.
  • There was a glitch where, if you exit the game and reopen it, it will try to sacrifice Farms again, replacing the previous income with the new. If there are no Farms in it's radius upon reloading the saved game, there will not be any sacrifices and thus the income will be set to 0. This means that if you plan to exit the game it may be a good idea to stock up on 4-2-0 Farms around the Village to be sacrificed upon reentering or save up some money to rebuild the Monkeyopolis. This has been patched as of July 2018.
  • The value of income gain produced by the Monkeyopolis can be increased by the level difficulty. This also means that for the same monetary value of Banana Farms in Impoppable will grant more cash income. This special mechanic of income cannot be done in other Banana Farms or even any other form of income.
  • There was a bug where the Monkeyopolis upgrade displayed "Upgrade Locked" without explanation if there are no Banana Farms present and if Monkeyopolis isn't already bought. This has been fixed as of version 4.0.
  • There were three ways to own a Monkeyopolis that cannot produce crates: the first method is to play on Easy Difficulty by placing the very first 0-0-0 Banana Farm in radius of a Monkey City prior to upgrading if the Banana Subsidy MK active (won't produce crates due to the lowered $945 cost being less than $1000), the second method is to place any Banana Farm Instamonkey nearby a Monkey City prior to upgrading it to Monkeyopolis, and the third method is to place a Monkeyopolis Instamonkey. This was fixed in Version 11.0, Monkeyopolis now always produces at least one crate.
  • There is a bug where if you purchase 2 Monkey Cities next to each other, then upgrade one to Monkeyopolis, the other Monkey City’s 15% income buff will apply onto Monkeyopolis. This bug disappears if you reload afterwards or buy the second Monkey City afterwards. This is still a bug as of Version 27.3.

Version History[]

In Version 11.0, Monkeypolis was adjusted to only produce up to 10 crates per round but scaling in income per crate if given over $20,000 worth of Farms. This was to make picking up Monkeypolis crates easier to deal with.

  • Change Monkeyopolis will now produce a maximum of 10 crates per round, and each of these crates will produce a scaling amount of cash based on the value of the farms consumed, with the crates themselves being worth more if greater than $20,000 worth of farms are sacrificed. Previously, it produced more than 10 crates to accommodate for the larger sacrificed farm values.
  • Buff Monkeyopolis now increases all income generated from towers within radius by +10% (inherited from Monkey City).
As currently it doesn't feel as valuable to use the City buff versus other cash producing towers, the buff Monkey City applies to other cash producing towers in radius has been increased.
~ Ninja Kiwi, referring to Monkey City
  • Buff Affected by Monkey City extra cash for income-generating towers buff


Official artwork[]


  • Monkeyopolis makes Monkey Village one of four non-special tower to do sacrifices. The others being Super Monkey with its Temple of the Monkey God/Sun Temple and True Sun God, Wizard Monkey with its original upgrade Soulbind (later replaced with Prince of Darkness), and Adora.
  • Similar to Monkey City, the time shown on the artwork is approximately 1:55 on the clock.
    • They also show the current time on players device, this behavior is very similar to building found in Monkey City known as Monkey Town Hall.
    • On every 5th minute, the minutes hand changes position, and the same applies to the hours hand.
  • Monkeyopolis can be considered cheapest Tier 5 upgrade assuming only 1 or 2 Banana farms are in influence radius.
  • This is only upgrade that dynamically changes its price (+5000$ per Banana Farm).
    • This price is never affected by price modifiers by difficulty.
      • But its still affected by Sun Temple/God Support Sacrifice discount buff.
  • In the game files, the upgrade icon for Monkeyopolis is written as "MetropolisUpgradeIcon.png".
  • Monkeyopolis used to be targeted by Alch buffs until Version 20.0 (at least that's when it is confirmed it no longer works).