Towers, also called monkeys or monkey towers,[fn 1] are units in the Bloons TD series. Most towers are deployed on the map by the player and cost cash to place. Most towers perform their actions automatically, but some can be controlled by the player more directly, such as by following the cursor or touch controls. Many towers can be upgraded by spending more cash to enhance their capabilities or unlock new functions.
Towers are a broad classification that encompass all kinds of gameplay elements, including Heroes, placeable Powers and Special Agents, and sub-towers. Most towers focus on defending against Bloons by dealing damage, but they can have many different roles, such as stalling Bloons, generating resources that assist the player, or buffing other towers, and can have multiple roles at the same time.
An attack is the process of a tower selecting a target and performing an action, typically aiming at a Bloon and firing projectiles at it. Towers can have multiple attacks, each with their own cooldown, which determines their attack speed. Attacks can have multiple functions, including:
Towers have a range stat that determines how far away they can target their attacks. A tower's range is indicated by a transparent circle centered on the tower; the numerical range value represents the radius of this circle. Typically, attacking towers should prioritize having as much track length as possible within their range, so that they have the best opportunity to attack Bloons as they pass by.
A tower's footprint is the invisible area of space that it is considered to occupy. Usually, towers cannot be placed such that their footprint overlaps other towers or terrain it cannot be placed on.
In Bloons TD 6 and Bloons TD Battles 2, towers are organized into different categories based on their appearance or abilities. Certain modes limit the player's access to tower categories, such as Military Only and Primary Only.
Beginning in Bloons TD 5, towers can have Activated Abilities, which are moves that are typically very powerful or offer strong utility, but must be manually activated and have a cooldown between uses. Abilities can have many different effects, such as attacking Bloons, buff other towers, generate cash.
In Bloons TD 6, abilities are usually first unlocked once a tower is upgraded to tier 4 in the middle path, with the tier 5 upgrade improving the ability further. Most Heroes have two or three Activated Abilities that they unlock at levels 3, 7 (if they have three abilities), and 10.
Select Paragons can also apply buffs to other towers, including other paragons. The Glaive Dominus grants an attack speed bonus to all primary towers, the Ascended Shadow grants Camo detection to all towers, and the Master Builder can apply an area of effect overclock to other towers.
This article or section needs more screenshots. See the screenshot guidelines for more information on what screenshots are needed and how to add them. The editor that added this notice elaborates: more collages of towers