Co-Op Mode (BTD6)

BTD5

BTD6

BTD6 Co-Op rules popup (before Double Cash became enabled)

Play Social screen (as of version 39), featuring Co-Op Daily Challenge, Lych as Boss Event, and the Contested Territory event that ended.

Main Menu of Co-Op (before ~22.0)

“	All Co-Op games share cash and hero xp [sic] evenly. For this game, you are playing: [Mode] – [Sub-Mode]	”
	~ BTD6 Co-Op rules popup

Co-Op Mode is a mode added to Bloons TD 6 in an update that was released on 2nd July, 2019, on Version 11.0. Unlike Bloons TD 5 Mobile, Co-Op Mode must be unlocked by reaching Level 20. It utilizes a peer-to-peer connection that involves 2-4 players cooperating on a random or private chosen game of BTD6 on a chosen map and difficulty.

Co-Op Mode can be accessed on the main menu. Players can either play on Quick Matches or create/join Private Matches. Each player will be assigned a specific number (P1, P2, P3, or P4) depending on when they joined the Co-Op lobby. Players can leave and re-join at any time during the Co-Op match, but there are still risks to leaving a match.

Players are limited by their respective sides, usually a specific quadrant(s), unless the tower territory distribution is modified by a specific map. Some maps may have universal territories, as indicated by a colored "A" symbol, to represent an "All Players" territories. Players may only transport their own towers via Support Chinook only to within their allocated territory(s). Collectable items, such as bananas from Banana Farms, are only able to be picked up by the owner of the tower(s) that outputted the collectable items. In addition, other players cannot modify other players' towers or sacrifice them, with the only exception being Sun Temple, True Sun God/Vengeful True Sun God and Paragon sacrifices. However, abilities that lack the possibility of accidental sabotage such as Jungle's Bounty (counts everyone's Banana Farms in range) can become influenced or can influence other players' towers.

Every player starts with the same amount of cash minus $100 (-$50 in Half Cash) for 2-Player, and minus $50 per additional player (-$25 per additional player in Half Cash). If the "More Cash" MK is unlocked by any player, it will be distributed evenly among each player. While playing the game, the full cash is gained for a particular player's cash account while popping bloons or generating cash. Players can share or request cash during the game on at anytime via the Co-Op Communication Menu on the right-hand side of the screen.

Each player can choose their own Hero and is allowed their own set of Tier 5 towers (i.e. up to 4 of a single Tier 5 on each side, up to 8 for Crossbow Master with "Master Double Cross" MK enabled), which allows each player to decide on their own sets of Tier 5 towers without another disrupting other players' Tier-5 tower selection progress.

If one player has a given Monkey Knowledge upgrade, the upgrade is applied to all players. For example, if one player has the Bonus Monkey! Knowledge upgrade, every player will start with a free Dart Monkey. However, multiple instances of the same upgrade will not stack, so even if two or more players have the Bonus Monkey! upgrade, only one free Dart Monkey will be given to each player. If a Monkey Knowledge upgrade does not "apply to each player" and only contributes to the overall game instead of each player, then only one instance of any given upgrade will be used. For example, if a player has the Mana Shield Monkey Knowledge upgrade, only one instance of the Mana Shield will be present (i.e. only 25 bonus lives.)

Additionally, Co-Op Daily Challenges may appear around 2 times per week; one on Sunday and another on Wednesday.

Co-Op functionalities

Co-Op game with multiple heroes and a variety of different towers

Opened Communication menu of Co-Op

Players are able to request and exchange cash from one player to another and send emotes with in-built functions. To access Co-Op related communicational commands, tap the Co-Op button on the right of the screen to open.

Once on the menu, the subject player may request cash by tapping "Request" button. Every other player will be alerted that the subject player requested cash by two alerts: an exclamation mark popup next to their player number, followed by an alert sound effect. The player can also tap the emotes button to open a list of emotes, which can then be sent to other players. The other players will be alerted of the emote by the subject player.

Players can mute other player's cash requests or emotes by pressing that player's mute button on the menu.

If the player(s) lose all their lives, any of the available players must press the Continue button in order to continue (unless CHIMPS Mode, Deflation Mode, or any other mode that limits use of Continues). Players may restart, but only players who presses restart will be redirected to a restarted match.

Available emotes

Here is a list of the available emotes that can be sent to other players.

Default emotes

These emotes are provided to the player at the start.

• "Hi!"
• "Ready!"
• "Well done"
• "Good job"
• "Thanks"
• "Sorry!"
• "Slow!", likely to be used when needing to turn off Fast Forward
• "AFK" (away from keyboard)
• "GG" (good game)
• A laughing Monkey head
• A Monkey head giving a thumbs up
• A Monkey head giving a thumbs down
• A dizzy Monkey head, resembling the one shown on the Defeat screen
• A crying Monkey head
• A green camo bloon, likely to be used to signify rounds with camo such as rounds 24, 42, and 51.
• A Lead Bloon, likely to be used to warn against rounds with lead bloons such as rounds 28 and 59.
• A Zebra Bloon, Rainbow Bloon, and Ceramic Bloon, likely to be used to signal against thermal bloons or rainbow/ceramic rushes such as rounds 26, 63, 76, and 78.
• A MOAB, BFB, ZOMG, and BAD, likely to be used to notify others to prepare MOAB defenses against rounds such as 40, 64, 75, and rounds past 80.
• Ability icons for Fire Cocktail, Concussive Shell, and Brambles, to represent use of hero abilities.
• A piggy bank, likely to notify others about farming or to collect Monkey Banks.
• Icons of Support Chinook health crate, Jungle's Bounty, and Merchantmen, likely to notify others about farming.
• The hero icons of each hero that the players on the team is using.

For a more detailed list of possible interpretations of each default emote, see Co-Op Mode (BTD6)/Strategies #Emote Interpretation.

Trophy Store emotes

Main article: Trophy Store#Co-Op

These emotes have to be bought at the Trophy Store before they can be used.

Special tower interactions

There are some interesting interactions that are worth noting that may cause changes in tower behavior and player strategy, including:

Trade Empires stacking across multiple players

• After ending each round, the total gained Hero XP is divided evenly to each player's placed Hero.
• Level 4+ Benjamin's Skimming income generation will increase every player's income evenly (so +$0.5 per bloon for 2 players, $0.33 per bloon for 3, $0.25 for 4). This income generation can be stacked with other players' Benjamin Skimming income generation. (Tested in patch 22.2)
• Jungle's Bounty (x4x Druid) affects all players' nearby Banana Farms within the Druid's own bounty range.
• Super Monkey Fan Club (x4x Dart) affect up to 10 nearby Dart Monkeys regardless of owners, respectively.
• Plasma Monkey Fan Club (x5x Dart) affect up to 20 nearby Dart Monkeys regardless of owners.
• Total Transformation (x5x Alchemist) affect towers regardless of owners.
• Spirit of the Forest (x5x Druid) on-track thorned bramble growths can stack with other Spirits of the Forest, producing extra damage to all bloons on screen.
• Sub Commander (xx5 Sub), Energizer (5xx Sub), Prince of Darkness (xx5 Wizard), and other Tier 5 towers that add buffs to other towers do not stack their own buffs when multiple of them are placed. However, multiple Sub Commanders without the Sub Admiral MK can still add limited-range buffs to Monkey Subs nearby.
• Trade Empire (xx5 Buccaneer) will stack effects with other player's Merchantmen. The parameters of this require further testing.
• Shinobi Tactics and Poplust buffs can only stack up to 20 times and 5 times, respectively, towards their respective towers (Ninjas and Druids, respectively), regardless of player ownership.
• Alchemist buffs and Monkey Village buffs can target any players' towers.
• Multiple Obyn Greenfoots use their own respective Wall of Trees for each respective player.
• Overclock and Ultraboost abilities may be used on any available tower, regardless of player ownership.
• Adora can only sacrifice towers owned by the player who owns her.
• The "Come On Everybody!" MK is separated from each player, and thus is treated for each player as though the other players' Primary Monkeys do not exist.
• Admiral Brickell's Mega Mine can be placed on any area of water, regardless of player ownership.
• Benjamin's per-round income is given only to the player who owns Benjamin.
• Bloon Traps and XXXL Trap rewards are given to the successful trapper.
• Pre-Emptive Strike's passive pre-emptive strike attack stacks with multiple Pre-Emptive Strikes, allowing them to deal more damage to incoming blimps.

Other special interactions

• Hero voicelines (including levelup and leak voicelines) are randomized differently from player to player.
• Jukebox settings are not shared with other Co-Op members.
• Achievement-earned settings (e.g. Big Monkey Towers Option, Small Bloon Option) are set to whatever the player has set, rather than appearing on other players' screens.
• Pausing the game by the settings menu does not affect Co-Op connection, but certain actions that trigger pausing (e.g. pulling the status menu on iOS devices) will cause a temporary loss in Co-Op connection.
• Players receive different Insta-Monkeys upon reaching 100-round milestones.
• Golden Bloon rewards are shared to all players in Co-Op.

Maps

Unlike BTD5, all maps are available for Co-Op. However, each map has different territory distribution boundaries depending on the nature of the map. Some maps, such as Firing Range and all Expert Maps, do not have any boundaries; these maps are marked on the map display with a colored "A" symbol to indicate that all pieces of land are universal. The game uses the same configuration for 3-player games as it does with 4-player games, but one of the quadrants will be available to all players. The following key will be used to identify maps' configurations:

• All / Free For All = All players can place towers anywhere
• Horizontal = Split a horizontal line across the center of the map
• Vertical = Split by a vertical line down the center of the map
• Down Diagonal = Split by a diagonal line from the top-left to the bottom-right of the map
• Up Diagonal = Split by a diagonal line from the bottom-left to the top-right of the map
• Straight 4 = Split into quadrants by a horizontal and a vertical line.
• Diagonal 4 = Split into quadrants by 2 diagonal lines.

Co-op daily challenges can overwrite a map's configuration. Additionally, Co-Op settings can override the default map configurations of a map.

Additional map splits that are not available by default on maps include:

• Circle
• Square-In-Square

Map	2-Player Configuration	3 & 4-Player Configuration
Beginner
Monkey Meadow	Horizontal	Straight 4
Tree Stump	Down Diagonal	Diagonal 4
Town Center	Horizontal	Straight 4
Middle of the Road	Horizontal	Straight 4
One Two Tree	Free for All
Scrapyard	Free for All
The Cabin	Vertical	Straight 4
Resort	Up Diagonal	Diagonal 4
Skates	Down Diagonal	Diagonal 4
Lotus Island	Free for All
Candy Falls	Up Diagonal	Diagonal 4
Winter Park	Free for All
Carved	Vertical	Straight 4
Park Path	Free for All
Alpine Run	Horizontal	Straight 4
Frozen Over	Free for All
In the Loop	Up Diagonal	Diagonal 4
Cubism	Free for All
Four Circles	Vertical	Straight 4
Hedge	Horizontal	Straight 4
End of the Road	Vertical	Straight 4
Logs	Horizontal	Straight 4
Intermediate
Water Park	Free for All
Polyphemus	Free for All
Covered Garden	Free for All
Quarry	Up Diagonal	Diagonal 4
Quiet Street	Free for All
Bloonarius Prime	Free for All
Balance	Free for All
Encrypted	Free for All
Bazaar	Horizontal	Straight 4
Adora's Temple	Horizontal	Straight 4
Spring Spring	Horizontal	Straight 4
KartsNDarts	Horizontal	Straight 4
Moon Landing	Down Diagonal	Diagonal 4
Haunted	Vertical	Straight 4
Downstream	Down Diagonal	Diagonal 4
Firing Range	Free for All
Cracked	Down Diagonal	Diagonal 4
Streambed	Vertical	Straight 4
Chutes	Vertical	Straight 4
Rake	Free for All
Spice Islands	Horizontal	Straight 4
Advanced
Dark Path	Free for All
Erosion	Free for All
Midnight Mansion	Free for All
Sunken Columns	Free for All
X Factor	Free for All
Mesa	Up Diagonal	Diagonal 4
Geared	Free for All
Spillway	Vertical	Straight 4
Cargo	Free for All
Pat's Pond	Horizontal	Straight 4
Peninsula	Free for All
High Finance	Vertical	Straight 4
Another Brick	Vertical	Straight 4
Off the Coast	Horizontal	Straight 4
Cornfield	Free for All
Underground	Up Diagonal	Diagonal 4
Expert
Glacial Trail	Free for All
Dark Dungeons	Free for All
Sanctuary	Free for All
Ravine	Free for All
Flooded Valley	Free for All
Infernal	Free for All
Bloody Puddles	Free for All
Workshop	Free for All
Quad	Free for All
Dark Castle	Free for All
Muddy Puddles	Free for All
#Ouch	Free for All

Quick Matches

Quick Matches are publicly available, and there are three types of Quick Matches, all of which could have 2-4 players per match. The following match modes are listed:

Match Mode	Map Difficulty	Game Difficulty	Game Modifier
Any Game	Any map	Any difficulty	Any mode
Medium Game	Beginner, Intermediate or Advanced	Easy, Medium, or Hard	Standard, Primary Monkeys Only, Military Monkeys Only, Reverse, Magic Monkeys Only, Double HP MOABs
Long Game	Intermediate or Advanced	Hard	Standard, Magic Monkeys Only, Double HP MOABs, Alternate Bloons Rounds, Impoppable, C.H.I.M.P.S

Completion

Main article: Victory Callouts

When successfully completed a game mode, there will be a two-page completion screen: the first page will include a list of useful statistics relating to each of the contributing players, alongside an image depicting the game's interpretation of the highlight statistic for each player.

Co-Op Events

Two Co-Op events exist:

• Co-Op Challenges, which have additional challenge restrictions added on top, and are run by Ninja Kiwi.
• Co-Op Boss Events, played in multiplayer for the currently running Boss Event.

Strategies

Main article: Co-Op Mode (BTD6)/Strategies

Bugs

Player 1 can send an Obyn Greenfoot emote even though the Co-Op Challenge doesn't allow the usage of heroes.

• If too many people join a private match at the same time, the co-op match can glitch. This was patched on version 11.1.
• Players used to not earn progress towards achievements such as Survivor or Inflated in the game (reaching round 100 on Apopalypse or Deflation respectively). However, these achievements can still be earned outside the game (in Steam achievements, Game Center, etc.). This was patched on version 11.1.
• There is a known bug (commonly known as the "Thanos Snap") where if you reach a certain round, at the end of the round when the server refreshes the map many towers can disappear, which can be infuriating and may cost the game. This bug occurs due to poor server communication or when crashing other players from the game, and it is known to happen later in the game, usually at or around rounds 59-60, rounds 75-80, and rounds 90-100. Depending on the severity, it might only affect one player's towers or all the towers besides the ones placed early in the game. While this glitch can still happen, it's now less likely to occur since version 12.0.
  • It was presumed that having an IMF Loan could be the cause of activating this glitch, but this was proven false when this glitch even occurred on C.H.I.M.P.S.
• If the above glitch occurs, one player might get the Defeat screen but the other players can get the Victory screen. Only the players who reach the Victory screen will get the rewards; the player who got the Defeat screen will earn nothing.
• If a player leaves the game and the person who gets the leaving player's hero has the other costume of the hero active, it will change to the new costume when the hero levels up. For example, if the player who left had the regular Gwendolin skin but the new player who has Gwendolin has the Scientist Skin active, it will change to Scientist Gwendolin when it levels up. This also affects voice lines.
• Since version 11.1, sometimes the "P# has left the game" message can reappear for a number of times later.
• In some cases, it might be impossible to give money to a player even though they are in the game. This has been patched around version 12.0.

Top: Co-op rewards displayed correctly, middle: co-op rewards displayed as a normal map attempt, bottom: co-op rewards displayed and given correctly

• If the server refreshes the map and the Pre-Game Prep MK is enabled, the road spikes will be reset after the refresh. Even if the road spikes run out, when the server refreshes, the road spikes will come back. It can be particularly helpful on some maps like End of the Road, Haunted, and Quad.
  • This has been adjusted with the new restart mechanic on version 13.0; now whenever the server refreshes, all of the Pre-Game Prep road spikes will disappear.
• When restarting a Co-Op Game with the "Restart" button, the free Dart Monkey from the "Bonus Monkey" MK does not become available again. This does not occur for the "Military Conscription" halved Military Monkeys MK.
• Likewise on older versions of the game, restarting a Co-Op game may keep all Ceramic Bloons from MOAB-Class Bloons "Super Ceramics", even before round 81.
• On version 12.0, there are numerous disconnections that may happen suddenly or even before the round starts.
• On version 12.0, it might be impossible to place towers on a certain part of the map after a player has left. This does not happen on maps where the player can place towers anywhere at the start.
• In Co-Op Challenges, the available hero emotes will always be the hero the players starts with before starting the challenge, even if it the hero is forced and no one has the hero prior to starting the challenge. This can result in players having emotes of other heroes that cannot be used in the challenge.
• Co-Op Challenges does not display rewards correctly on the teammate screen, but will appear correctly after the Co-Op Challenge is complete.

Unable to start Spillway on version 18.1, resulting in a unique error message

• If the game is lagging, you might be able to stack other towers on top of each other while waiting for the server to communicate.
• If the player selects a tower and then another player upgrades that tower, the upgrade paths won't update even though the artwork updates
  • If that upgrade causes a path to become locked, sometimes that path's upgrade shows as costing 3.422823*10^38. This is likely due to locked upgrades supposed to be unpurchasable.
  • This can also occur if the player upgrades their tower, then unselects and reselects that tower before the upgrade appears.
    • If the player then tries to upgrade that tower, the upgrade will work if the player can afford the actual upgrade for that path, and the price glitch occurs if a path becomes locked by that upgrade.
• If the player has the jukebox enabled and leaves an in-progress co-op game, the music from the game plays on top of the main menu music. This seems to only occur when a round is in progress.
• Spillway cannot be played in co-op on version 18.1 due to a bug with the map crashing upon starting.
• Even if all players left the game, the latency for placing towers and starting rounds stay the same.
• Rarely, the game can get stuck when refreshing. This renders the match unplayable as the next round never starts.
• during a refresh or occasionally when a player has poor connection, the game runs noticeably slower
  • When the game is running slower, all tower animations/particles, and animations for hiding/revealing the power, ability, and co-op emote menus run slower, and bank deposit animations loop. Other menus work at normal speed

Differences between BTD5 and BTD6

• All maps can be played in Co-Op mode

Version History (BTD6)

Balance Changes

11.0

• Initial release

12.0

• Multiple Obyns now can use separate Walls of Trees
• Monkey Money first time completion reward balance. The first time completion MM bonus will no longer apply separately for both Single Player and Co-op. Now it will only apply for the very first time regardless of Play Mode.
• Informative Co-op emotes - be social or share tactics

18.0

• Added codeless 'Local' Matchmaking to co-op for users connected over the same wifi
• Other players will be able to view these shared stats on player profile popups found on leaderboards & in co-op lobbies.
• [undocumented] More Cash no longer gives +200 cash to all players in a co-op game, rather it is split up among them

19.0

• Double Cash is now enabled for players who own and activate them.
• Awesome new Co-Op Emotes of all varieties, even audio

20.0

• New Co-Op Emotes:
  • ...

21.0

• New Co-Op Emotes:
  • Scream

22.0

• New Co-Op Emotes:
  • Happy Holidays Emote
  • Celebration Emote
  • ...

24.0

• New Co-Op Emotes:
  • Dancing Monkey Emote
  • ...

25.0

• New Co-Op Emotes:
  • Trophy Winner Emote
  • Player Numbers Emote

26.0

• New Co-Op Emotes:
  • Activate! Emote
  • ...

27.0

• Players can now rejoin their co-op game
• New Co-Op Emotes:
  • Next Round! Scary! Text Emote
  • Fist Pump

28.0

• Added Co-Op Boss Events

29.0

• Added Co-Op Split Editing
• Added two new split options: Radioactive, Stairs

Bug Fixes

12.0

• xx5 Resolved some funky stuff going on in co-op games that was confusing
• Resolved a co-op crash that could occur occasionally when sending money on round 1
• Round 100 achievements will work in co-op now
• MOAB Mines now count towards your MOABs-popped in Co-op
• 5xx Temple persistent desync issues resolved in co-op
• A visual issue where the "Restart" option in co-op didn't show MK Dart Monkey as 'free' has been resolved

12.1

• Resolved a crash when placing an insta-monkey in a co-op daily challenge then returning to menu

13.0

• Hero Boosts work correctly in co-op again

14.0

• 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
• Substantial refactor of co-op lobbying, connections, and player to player messages, for efficiency and stability

15.0

• 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
• Player zones in non-FFA co-op should no longer shuffle when a desync occurs
• 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

15.1

• Co-op daily challenge private match codes should work again

16.0

• x4x IMF Loan debt should now correctly transfer in co-op

16.2

• Resolved a co-op timeout crash
• Resolved a crash for low level players attempting to join co-op
• Resolved a crash for android devices using the back button during co-op search too quickly after beginning the search

17.0

• Co-op stat "Bloons Popped" has been changed to "Pop Count"
• Co-op resync should now be less obvious
• Collection event should visually show correct values on the co-op menu now
• Reduced memory spike during co-op resync to lessen crashes when this occurs

19.0

• Local co-op lobbies will no longer disappear from your list while players are still in the lobby if the host leaves
• In player stats Co-op Pops & Cash Gifted should no longer have the same display value
• 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
• Double Cash can now be enabled in Co-Op Mode.

19.2

• Round 81+ cash generated from pops reverted to normal

Sounds

When player connects (since ??.x):

• [???]

When player disconnects:

• [dial down sound]

When player requests cash:

• [notify sound]

Gallery

Version 11.0 Menu, containing the introduced Co-Op Mode

Two Co-Op Mode Achievements unlocked

Connection Menu, preparing each player to connect in Co-Op

"Connecting Player" messagebox

Lose menu in Co-Op. Note the hollowed out Restart Button, due to servers requiring time to save the connections data

Disconnected lose menu in Co-Op.

"Reconnecting Your Game" message

"Build your monkey towers in the green area" message on Moon Landing

"Build your monkey towers in the green area" message on Pat's Pond

"Build your monkey towers in the green area" message on High Finance

Version 12.0 Co-Op Menu on the main section

Muted Player 2

Cracked with tower placement allowed anywhere instead of diagonal 4 in a co-op challenge

Co-Op Mode with four Heroes: Adora, Quincy, and two Bens with different skins

Game Over in Co-Op, after reaching Freeplay and losing

Named section allocations (Version 26.0 added)

Completing Co-Op Apopalypse (note the attacking towers with bloons)

"Quit?" messagebox

"Rejoining..." messagebox

Seeing a Manual Targeting reticle from an allied player's Obyn in Co-Op

Setting up a private game

Co-Op game not able to sync data

"Loading..." for upgrade prices since about v39.2, replacing the 3.402823 × 10^29 price glitch (source)

Co-Op Match Icons

Quick Match

Medium Match

Long Match

Co-Op Player Count Icons

Co-Op Search Icon

2-Player Co-Op Icon

3-Player Co-Op Icon

4-Player Co-Op Icon

Co-Op Player Type Icons

Player 1 Icon

Player 2 Icon

Player 3 Icon

Player 4 Icon

All Players Icon

Victory Screens

Sample 2-Player Victory Page 1 (Version 11.0)

Sample 2-Player Victory Page 2 (Version 11.0)

Winning Co-Op, some players marked by top/bottom cash generator and tower placer

Player receives Insta Winner highlight statistic

Players with Fumigator and Fired Up

Player with Metal Muncher

New Co-Op Engineer icon, introduced in Version 12.0 and later

Player with ZOMG Zapper accolade

Player with DDT Destroyer accolade

Earning Fireworks on Co-Op Mode

"Boss Crusher"

"DDT Destroyer", and "Most Generous" with Thrive icon

Emotes and Phrases

Version 12.0 Co-Op Phrases and Emotes Menu (part 1)

Version 12.0 Co-Op Phrases and Emotes Menu (part 2)

Thumbs Up Emote by Player 1

"Thanks!" Phrase by Player 1

Quincy Emote by Player 1

Obyn Emote by Player 1

DJ Ben Emote by Player 1

"Good Job!" Phrase by Player 1

Dizzy Emote by Player 1

Crying Emote by Player 1 (without tears, due to animation)

Thumbs Down Emote by Player 1

Ability Emote by Player 1

Income Emote by Player 2

MOAB-Class Bloon Emote by Player 1

Airhorn by Player 1

Confetti Cannon by Player 1

Disco Ball by Player 1

Love Hearts by Player 1

Stop Emote by Player 1

Co-Op Interactions

Player with Mega Mine deployed in a region outside their own territory

A 2-3-0 Wizard Monkey with the upgrade paths showing as 2-2-0. Note the artwork and tower in-game are properly showing up as 2-3-0

Another player's Glue Gunner with price bug on Glue Hose

The player's Druid, with Heart of Oak price bugged

Biohacked Captain Churchill

Both Adora and Striker Jones available to place after teammate disconnected in co-op DC

A Vengeful True Sun God can be placed by one player, while other players can still place tier 5 Supers, but they cannot get another Vengeful True Sun God even with max sacrifices

Other PNGs

Bad connection icon

Confused Monkey

Crying Monkey

Smiley Monkey

Thumbs Down Monkey

Trivia

• Ninja Kiwi released Bloons TD 6's Co-op mode in Version 11.0, which allows up to four players to play at the same time.
• For some tracks (such as Firing Range), players can place towers anywhere on the map.
• In contrast to BTD5, even if all other players leave the game, a Co-Op medal will be awarded to the remaining player(s) for a win.
• If all players have the same hero, some buffs will not stack.
• If a co-op game is set to a map with quadrants, and a player left, the space for that player will be available to all players, also, the towers/powers that are left are also available to all players to access.
  • Towers/powers are distributed evenly between the remaining players.
  • In Co-Op Daily challenges with limited towers and/or limited max monkeys, unused towers are distributed evenly too.
    • If players can use their own hero, and a player disconnects, another player can use that hero, allowing 2 or more placeable heroes.
• Unlike most Tier-5 towers, only one Vengeful True Sun God may be on the map at any one time. This does not fully disable any existing The Anti-Bloons or Legends of the Night from other players other than the player who have the Vengeful True Sun God, nor block the ability to get tier 5 Super Monkeys other than the player who has the aforementioned temple.
• It is possible on Quick Matches to be involved in difficulties that cannot be encountered by normal means, such as Easy Reverse or Medium Magic Monkeys Only. If these modes are completed, the player will only be rewarded for the Monkey Money and earn no medal for completion of the mode.
• If the player completes a match for a mode that is not unlocked, the player will still earn the medal for completing the mode if the team wins. For example, if the player hasn't unlocked C.H.I.M.P.S. for the map but joins and completes a C.H.I.M.P.S. game for that map, the player will earn the C.H.I.M.P.S. medal despite not having the Impoppable medal.
• Even though the badge for a red Co-Op C.H.I.M.P.S. medal exists in the game, it cannot be obtained normally as the player cannot leave a Co-Op game and come back, meaning that the players who complete C.H.I.M.P.S. on Co-Op will always get the black medal.
• All of the maps have been solved on Co-Op C.H.I.M.P.S.

• List of confirmed achievements that are shared in Co-op
  • Perfect Paragon
    • Even if another player placed the paragon, the player will get the achievement.
  • Student Loans
    • Even if another player went into debt, the player will get the achievement.