Co-Op Mode (BTD6)

"All Co-Op games share cash and hero xp [sic] evenly and double cash mode is disabled. For this game, you are playing: [Mode] – [Sub-Mode]"

- BTD6 Co-Op rules popup

On 2nd July 2019, Version 11.0, Co-Op Mode has been released to BTD6. The player unlocks Co-Op Mode at Level 20. 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 their timing to a Co-Op 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 and True Sun God/Avatar of the Vengeful Monkey sacrifices.

Every player starts with roughly the same amount of cash as if the game wasn't Co-Op. However, the total players' starting income is shared equally among each player whenever the game starts, so some players may have more or less income depending on each others' starting cashes. While playing the game, the full cash is gained for a particular player's cash account if he/she pops bloons or generates cash.

Before playing each game, players will be able to choose their own Hero; this is to be done before starting up Co-Op Mode, as there is currently no way to change Hero while waiting for players to connect to a Co-Op Mode game. In addition, players are 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 special MK), which allows each player to decide on their own sets of Tier-5 towers without another disrupting other players' Tier-5 tower selection progress.

(Additional rules to be added later)

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.


 * This section is incomplete. You can help by expanding it.

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:

Co-Operation
There is currently no chat option available in Co-Op Mode. However, players are able to request and exchange cash from one player to another 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.

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.

Completion
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:


 * This section is incomplete. You can help by expanding it.

Trivia

 * Ninja Kiwi released Bloons Tower Defense 6's Co-op mode in update 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.
 * If all players have the same hero, some buffs will not stack.
 * Since cash is evenly distributed between players, you'll earn cash slowly, so Benjamin is a must hero.
 * If a coop 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.