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Footprint is the term given to the space taken up by a particular tower. The size of a tower's footprint is usually dependent on its power. Stronger towers usually have a larger footprint while the weaker towers usually have a smaller footprint, although this is not always the case. Sometimes, a tower's actual footprint is smaller than the actual model that the player sees and vice versa.

Strategies[]

11 monkey subs in one portable lake

A very economic player that managed to put 11 Monkey Subs on a single Portable Lake

The size of the footprint can alter the strategies when trying to place strong towers on small pieces of land or water, where some towers cannot possibly rest on the part of the land or water.

In the Mobile and Steam games, turning on "Drop and Lock" in options will make it easier to place towers with different footprints. It will also help trying to align the tower as economically as possible for other towers to be placed, especially if there is tiny land/water space, such as on Pontoons or Portable Lakes.

In the Flash games, a common trick is to reduce the game quality to low if the option is available. This slightly reduces tower footprints, allowing more towers to be placed.

On certain tracks, there is less space for towers to be placed, and thus making it harder towards the end game, due to most players typically adding Temples of the Monkey God with multiple sacrifices of large financial worth towards the end game. Tracks to be careful of include Space Truckin', Dockside, River Rapids, Cornfield, High Finance, and Peninsula.

Bloons TD 3[]

Flash version[]

The footprint sizes of all previous towers remain the same. In addition, the Spike-o-Pult has a very similar/same footprint size to the Dart Monkey.

Digital Goldfish Ports[]

Unlike the Flash version, all towers now have the same footprint sizes in the Digital Goldfish ports of Bloons TD 3. Thus, players can fit far more Super Monkeys than typical.

Bloons TD 4[]

Flash version[]

TBA

Mobile Version[]

In Bloons TD 4 Mobile, most towers start off at the same footprint. Some upgrades, such as Sun God, may increase footprint, causing the player to become unable to place new towers where they could previously be placed before buying the upgrade. This can also cause issues with trying to upgrade towers crammed into an upgraded tower's footprint, as those towers can often become unable to be upgraded.

Bloons TD 5[]

Flash version[]

In Bloons TD 5, there are 11 different footprint types that towers can have. In Bloons TD 5 Deluxe, there are 12 types. In Bloons TD Battles and Bloons Monkey City, only the first 8 of those types are used.

Footprint types are defined using shape objects. Due to the imprecise nature of shapes in Adobe Flash, upgrading a tower, changing the quality settings, or changing size of the game window can cause very slight fluctuations in footprint positions and sizes. The impact of this is usually not noticeable, but it can cause issues when attempting to place groups of towers such as Banana Farms precisely.

Shape Dimensions Towers/upgrades Special Agents Other
BTD5F-FootprintSmall 24x24
BTD5F-FootprintMedium 30x30
BTD5F-FootprintLarge 38x38
BTD5F-FootprintAce 80x35
BTD5F-FootprintVillage 38.2x44.9
BTD5F-FootprintFarm 66x66
BTD5F-FootprintMortar 65x33
BTD5F-FootprintTemple 135x135
BTD5F-FootprintBloonsday 85x85
BTD5F-FootprintLake 84x84
BTD5F-FootprintPontoon 74x74
BTD5F-FootprintPillar 72x54

Mobile version[]

TBA

BTD6[]

Monkey footprints[]

BTD6 maptemplate

Footprint values included in BTD6 map template

From smallest to largest:

Tower Footprint Type Footprint radius/length
All placeable sub-towers, Beast Handler's beasts (only when overlapping square footprints) N/A 0
Genie Bottle, Creepy Idol Circular (check) 1
Paragon Power Totem Circular (check) 2
Geraldo's tower-like objects (e.g. Shooty Turret) (except for Genie Bottle, Paragon Power Totem, and Pet Rabbit) Circular 3
Banana Farmer, Tech Bot, Energizing Totem Circular 5
Dart Monkey, Tack Shooter, Ice Monkey, Glue Gunner, Sniper Monkey, Ninja Monkey, Alchemist Circular 6
Boomerang Monkey, Bomb Shooter, Monkey Sub, Dartling Gunner, Wizard Monkey, Druid, Engineer Monkey, Beast Handler, Cave Monkey, Heroes (except Churchill and Pat) Circular 7
Monkey Buccaneer, Spike Factory, Captain Churchill, Pat Fusty Circular 8
Monkey Ace (height) Rectangular height 18
Mortar Monkey, Super Monkey, Monkey Village Circular 11
Heli Pilot, Pontoon Rectangular 27
Monkey Ace (width) Rectangular width 28
Banana Farm Rectangular 30
Portable Lake Circular ??
Sun Temple Rectangular 40
True Sun God, Vengeful True Sun God Rectangular 50

Note: Heli, Ace, Banana Farm, and Pontoon use rectangular placement. Weirdly, that seems to mean that, when one of them is involved in a placement, collision is determined by assuming BOTH towers are rectangular. For example, if you place an Ace near a Druid (which is not rectangular), the Druid will be assumed rectangular. Same for placing a Druid near an Ace. Sun Temple and True Sun God may also be rectangular.

In maps where towers can rotate (e.g. Geared, Sanctuary), rectangular towers (except Ace and Heli) do not rotate, even if the tower moves.

Select sizes for stages[]

  • Lotus Island: Bottom-right island can fit two Boomerangs.
  • Hedge: There are 8 gaps to place towers, four on each side. The first four bends can fit: Spike, Spike, Boomerang, Dart. The last four are the same in reverse.
  • Cubism: Orange triangle near the end can fit a Dart. Orange triangle near center can fit up to Spike Factory. Small red triangle near center can fit Boomerang (but this requires intense precision).
  • X Factor: Center can fit a Mortar, or three Darts.
  • Infernal: Upper-left and two side rocks can hold Heli. All rocks can hold Ace. Side rocks can fit Banana Farm.
  • #Ouch: Corners of puddle can hold Spike.

Placement areas blacklisted and whitelisted for specific towers[]

  • One Two Tree: Bottom land portion allows up to Boomerangs
  • Scrapyard: Vertical loop allows up to Boomerangs
  • Carved: Cauldron can fit up to one XL-sized tower and regards any tower placed in it to have a set footprint
  • Logs: Narrow gaps between logs and tracks can allow up to Darts.
  • Covered Garden: Right side of garden allows up to Dart
  • Balance: Multiple spots hold up to Boomerang
  • Bazaar: Central area hold up to Boomerang
  • Adora's Temple: Peak of temple holds up to Boomerang
  • Erosion: Glacier cannot hold Heli, but can hold Farm
  • Midnight Mansion: Carpet only allows up to Boomerang. Drawers can hold up to Ace or Supers. Neither can fit Heli.
  • Mesa: Middle portions of non-elevated land allows up to Boomerang
  • Spillway: Barrel in the very center can fit a Dart.
  • Cargo: Edge of the highway can allow up to Darts.
  • High Finance: Peak of building right above the pond can hold Dart; the four blue-windowed buildings and the building directly south of the pond can hold Mortar or Village, but oddly not Super
  • Off The Coast: All three boat pieces can hold Spike Factory.
  • Workshop: Loops can fit up to Boomerang.
  • Dark Castle: Edge of wall can fit up to Boomerangs.
  • Carrier Flagship (tower): Up to Boomerang.

BTDB2[]

Rough estimates by exephur, a member of the r/btd6 community who also runs BTD6 Index:

  • All heroes are medium sized
  • Small
    • Dart, Tack, Ice, Sniper, Ninja, Alch
  • Medium
    • Boomer, Bomb, Glue, Sub, Wizard, Super, Druid, Engineer
  • Large
    • Bucc, Dartling, Spact
  • Extra Large (Round)
    • Mortar, Village
  • Extra Large (Rectangle)
    • Ace
  • Extra Large (Square)
    • Heli
  • Extra-Extra Large (Square)
    • Farm

Ordered by tower type then volume.

Trivia[]

Mortar footprint

The Mortar Tower with footprint placement dependent on its barrel

  • This is an official term as seen in the Bomb Shooter's Monkey Knowledge Card of Ranks 3, 8 and 13. It reads "Footprint reduced by 5%/10%/15%" respectively.
  • The Mortar Tower's footprint in BTD5 is the size of the barrel before the tower is placed. The tower can be moved at any position, and can be made to look as if it is on the track. Any more placements of any other Mortar Towers may be influenced by any other Mortar Tower barrels being already placed.
  • The Super Monkey is actually slightly larger than the Monkey Village in BTD6, but it’s not significant enough to be listed as a different value.

Footnotes[]

  1. Due to a bug in all games, the Monkey Ace's footprint changes to the previous footprint type when upgraded beyond tier 2.
  2. The footprint is located at the base of the Mortar Tower, not at its center like with most other towers.
  3. The "Socket of Power" is technically a tower, though it is impossible to tell during normal gameplay.
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