Co-op (BTD6)

For Co-op in Bloons TD 5, see Co-op (BTD5).

Co-op is a multiplayer mode in Bloons TD 6, introduced in version 11.0. It allows up to four players to play in a single game simultaneously using a peer-to-peer connection. It is unlocked at level 20.

Mechanics

• Each player has their own Hero, though if multiple Heroes are placed, then the XP earned is split among them.
• Opening the options menu does not pause the game.
• The host cannot select maps they have not unlocked yet. Other players in the group can play on maps they have not unlocked yet, however.
• Auto Start mode is enabled if at least one player has it enabled.

Experience

• All players earn the same amount of experience for their player level as in singleplayer.
• Tower XP at the end of each round is distributed among players equal to the ratio of cash they have invested into their towers and upgrades relative to the total amount of cash invested into towers and upgrades for that game. For example, if player 1 has invested $400 into towers and upgrades and player 2 has invested $600 into towers and upgrades, then player 1's towers will receive 40% of the tower XP at the end of each round and player 2's towers will receive the other 60%. For each player, this XP is further distributed among their towers based on the cash invested into each tower type in the same way as in singleplayer.
• If multiple Heroes are placed at the same time, the XP is split among them evenly.

Ownership

If a player places a tower or uses a power, that player becomes its "owner". Players cannot upgrade, sell, activate the abilities of, or change the targeting options of towers they do not own. For the most part, towers and powers can still interact with towers owned by other players, including providing buffs to them (e.g. Monkey Villages, Alchemists, or Overclock), contributing to Jungle's Bounty, acting as platforms (e.g. Portable Lakes, Carrier Flagship, and Lord of the Abyss), and sacrificing them (e.g. Sun Temples, True Sun Gods, and Paragons). There are a few exceptions:

• Support Chinooks and Special Poperations cannot reposition or use Door Gunner on towers owned by other players.
• Adora cannot Blood Sacrifice towers owned by other players.
• Tech Bots cannot be linked to towers owned by other players.
• Emergency Unlock does not change the targeting of other player's Dartling Gunners. (verify)

Map splits

Maps in co-op are split into sections for each player. Players can only place towers in a section they own or in a free-for-all section, but towers can place sub-towers in sections not owned by their owner. Each map has a default split setting, but the host can change it to any split before starting the game.

• In the free-for-all split, all players can place anywhere on the map. This is the default for all Expert maps.
• Other splits have two sections if there are two players or four sections if there are three or four players. The fourth section becomes a free-for-all section if there are only three players.

Split	Default maps
Free-for-all	Template:BTD6 map list by default split
Horizontal	Template:BTD6 map list by default split
Vertical	Template:BTD6 map list by default split
Diagonal (top-left to bottom-right)	Template:BTD6 map list by default split
Diagonal (top-right to bottom-left)	Template:BTD6 map list by default split
Radioactive	—
Staircase	—

Cash distribution

Each player starts with the default starting cash of the selected mode minus $50 per player in the match. All cash earned from popping Bloon layers, and at the end of each round, is split evenly among all players. Double Cash Mode only doubles the cash per pop for players that have it enabled.

Cash generated by towers and powers only goes towards the owner, with a few exceptions:

• Effects that increase the cash earned per Bloon pop distribute the extra cash among all players. This includes Monkey Town's buff, Pirate Lord's ability, and Rubber to Gold's golden Bloons.
• Bloon Traps and XXXL Traps distribute half of the cash they generate among all players (i.e. the amount that would have been gained by popping the Bloons outside of a trap). The other half all goes to the owner.
• Benjamin's Skimming is distributed among all players.

Sending cash

Each player can send cash to another player or request cash from another player, except in Deflation mode. The amount of cash sent by pressing the send button depends on the amount of cash the player currently has:

• If one has $500 or more, they will send 20% of their current cash, rounded down.
• If one has $100 or more, but less than $500, they will send $100.
• If one has less than $100, they will send all the money they have.

Monkey Knowledge

Monkey Knowledge upgrades apply to all players, even to those who have not unlocked them yet, if at least one player has them unlocked. With one exception, their effects do not stack if multiple players own them. Some Monkey Knowledge has special behavior in Co-op:

• The extra cash from More Cash is distributed evenly among all players from each player that has it unlocked. If all players have it, then all players effectively gain the full $200.
• Come On Everybody! applies its buffs separately for each player.

Cosmetic items

• Place FX, Upgrade FX, Pets, Projectiles, Flags, and Power Skins only apply to the player that has them equipped.
• Pop FX and Bloon Skins alternate between each player's selected item, including having no item selected.
• Monkey Names are visible to other players.
• Cosmetic extras and Music Tracks are separate for each player and cannot be seen or heard by other players.

Emotes

Main article: Emote

Matchmaking

idk how inviting works

Quick Match

Quick Match allows the player to join any publicly-hosted game that fits the chosen constraint. If no match is found, the game creates a match with a random map (using its default map split), difficulty, and mode within the constraints.

Constraint	Map difficulty	Game difficulty	Game mode
Any Game	Any map	Any difficulty	Any mode
Medium Game	Beginner Intermediate Advanced	Easy Medium Hard	Standard Primary Only Military Only Reverse Magic Monkeys Only Double HP MOABs
Long Game	Intermediate Advanced	Hard	Standard Magic Monkeys Only Double HP MOABs Alternate Bloons Rounds Impoppable CHIMPS

Create Match

Create Match allows the player to create a match with a selected map, map split, difficulty, mode, and number of players. Matches are private by default, but the player can make them public to allow Quick Match players to join.

Join Match

Join Match allows the player to enter a public or private match by either using a code or searching for games hosted on the same Wi-Fi network.

Events

Several events support co-op or have separate modes for co-op.

• Co-op Daily Challenges are biweekly Daily Challenges that can only be played in Co-op.
• Collection Events have map bonuses in Co-op mode.
• Monkey Teams events run on the same maps in Co-op as in singleplayer. All players must use the allowed towers to earn the extra Monkey Money.
• Golden Bloon events run on the same maps in Co-op as in singleplayer. All players earn the same rewards for popping the Golden Bloon, regardless of if they contributed to popping it or not.
• Boss Bloon Events have separate leaderboards for 2-player, 3-player, and 4-player games in both Normal and Elite mode.
• Boss Challenge has separate scoring for 2-player, 3-player, and 4-player games in both Normal and Elite mode. This is the only way to play Blons and Protect The Yacht in Co-op.

Medals

Co-op medals function mostly the same as the solo medals. The red CHIMPS medal is earned if the player quits and re-joins the game later; this doesn't affect the type of CHIMPS medal the other participants earn, so it's possible for players to get different CHIMPS medals from each other even if they played the same match.

• 
  Co-op - Easy - Standard
• 
  Co-op - Easy - Primary Only
• 
  Co-op - Easy - Deflation
• 
  Co-op - Medium - Standard
• 
  Co-op - Medium - Military Only
• 
  Co-op - Medium - Apopalypse
• 
  Co-op - Medium - Reverse
• 
  Co-op - Hard - Standard
• 
  Co-op - Hard - Magic Monkeys Only
• 
  Co-op - Hard - Double HP MOABs
• 
  Co-op - Hard - Half Cash
• 
  Co-op - Hard - Alternate Bloons Rounds
• 
  Co-op - Hard - Impoppable
• 
  Co-op - Hard - CHIMPS
• 
  Co-op - Hard - CHIMPS

Console version

The console version of Bloons TD 6 supports local co-op by connecting additional controllers to the console. Despite being hosted on one system, local co-op games still cannot be paused or saved. Playing in local co-op earns singleplayer medals instead of co-op medals.

Update history

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Version 12.0

• New callouts: Head Detective, Metal Muncher, Fumigator, Fired Up, BFB Brawler, ZOMG Zapper, DDT Destroyer, Most Generous
•  If the player has less than $500, sending cash will now send as much cash as the player has or $100, whichever is lower
•  The bonus Monkey Money awarded by earning a medal on a map for the first time can now only be earned once in either singleplayer or co-op, instead of being awarded separately for singleplayer and co-op
• Round 100 achievements now work in Co-op

Version 13.0

•  First time completion bonuses are now only rewarded in solo play

Version 14.0

• "Substantial refactor of co-op lobbying, connections, and player to player messages, for efficiency and stability"
• "Sent money in co-op should now round off decimal places"
• "Resolved a crash in co-op with players leaving in the lobby"
• "Co-op non-host desync when backgrounding the app has been resolved"
• "Co-op ‘separate game’ desync has been resolved"
• "Co-op ‘Guests’ will now be given names"
• "Co-op ‘Thanos Snap’ bug has had a lot of preventative work done, but we’d appreciate any reports if user still find their towers randomly deleted in co-op."
• "Co-op using a cash drop before everyone has loaded in will no longer desync"

Version 15.0

• "Resolved an issue when loading save or co-op resync that would not save any cash gains from the very last attack in each round"
• "Resolved a co-op desync that could cause some players to never see the defeat screen or be able to continue playing"
• "Resolved a co-op desync that could kick every other player from the match"
• "Resolved a co-op issue causing some lower end devices to crash when viewing options"

Version 17.0

• Added a message that appears when attempting to join a lobby with a hacker flag
• "Bloons Popped" stat renamed to "Pop Count"
• "Co-op resync should now be less obvious"
• "Reduced memory spike during co-op resync to lessen crashes when this occurs"

Version 19.0

• Double Cash Mode now applies in Co-op
• "Resolved an issue where users could create a bugged co-op lobby"
• "Resolved a co-op issue where interactable objects would cause a desync"
• "Local co-op lobbies will no longer disappear from your list while players are still in the lobby if the host leaves"

Version 25.0

• Added deep link share buttons, these allows to create a link that will directly open the game on a Co-op lobby or in a custom Challenge
  • Note: On the Steam version of the game, the links don't work if the game is already open.

Version 29.0

• Continues & Restarts in co-op will now send a message to other players saying that they have been used
• New Co-op Callouts: Boss Crusher, Well Rounded, Endless Power!

Version 30.0

• Players creating Co-op lobbies can now choose which Co-op split to use for the match
• 2 new splits added (Radioactive and Stairs)

Version 36.0

• Added an audio prompt when players join co-op lobbies

Version 39.0

•  Resolved a bug preventing Golden Bloons working correctly for all players in co-op (bug fix)

Version 40.0

•  Co-op hosts will now be able to invite friends directly from the co-op lobby.

Version 48.1

•  Sword of Protection can now be used in Co-op when the game uses a map split (bug fix)