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This article is about the three (four on mobile, many on BTD6) game modes. It is not to be confused with Track Difficulty.

Difficulty is what determines how hard or challenging a Bloons Tower Defense game is, mainly based on the cost of towers, amount of lives, speed of bloons, and total rounds before Freeplay. Difficulties were introduced in BTD2 and have been in every BTD game since. There are 3 main difficulties: Easy, Medium, and Hard, along with other special modes debuting in the later BTD games - namely Impoppable.

Bloons Tower Defense 1[]

  • No visible difficulty variations - 1 track, 1 difficulty. Finish on round 50.

Bloons Tower Defense 2[]

  • 1 track per difficulty. Finish on round 50.

Bloons Tower Defense 3[]

  • Pick a track, then pick a difficulty
  • Easy Difficulty: Towers and upgrades have 85% normal price, 100 lives, and bloons move at default speeds. Freeplay has normal bloon spawns.
  • Medium Difficulty: Towers and upgrades have 102% normal price, 75 lives, and bloons move at +0.1 of their normal speed (For instance, a blue bloon has a speed of 1.4. On Medium, it has a speed of 1.5). Freeplay has tougher bloon spawns.
  • Hard Difficulty: Towers and upgrades have 108% normal price, 50 lives, and bloons move at +0.25 of their normal speed. Freeplay has even tougher bloon spawns than Medium.
  • While tracks do not have an official track difficulty, BTD3 notes that some tracks are far harder than others as noted by the Pre-Round Comment for Round 27, "Some tracks are hard on Easy, and others are easy on Hard. Ain't life funny."

Bloons Tower Defense 4[]

  • Pick a track, then pick a difficulty
  • BTD4 is where they added Track Difficulty, categorized by how hard the actual track is. This is shown in the select a track page.
  • Easy has towers and upgrades cost at 85% of Medium prices, 200 lives and 50 rounds.
  • Medium Difficulty has towers and upgrades cost the normal amount, 150 lives and 60 rounds.
  • Hard Difficulty has towers and upgrades cost at 108% of Medium's prices, 100 lives and 75 rounds.
  • Each difficulty also applies to Bloons Tower Defense 4 Expansion.

Bloons Tower Defense 4 Expansion[]

Bloons Tower Defense 5[]

  • Same as BTD4 - pick a track, then pick a difficulty - but there are also slight bloon speed alterations.
    • Bloons move slower on Easy mode, move at normal speed on Medium mode, and move faster on Hard mode.
  • Hard Difficulty has ten more rounds to pass than BTD4, (total 85), while Medium Difficulty has 5 more rounds to pass (total 65).

Bloons Tower Defense 5 Mobile[]

  • Easy, Medium and Hard Difficulties are the same as BTD5.
    • Impoppable Difficulty is introduced here, where you have only one life (life-gaining abilities and premiums are disabled), and the towers as well as their upgrades cost 20% more than medium (a little more than on Hard).

      All difficulties completed on The Rink in Bloons Tower Defense 5 Mobile

Bloons Monkey City and BMC Mobile[]

The difficulties for this game are Trivial, Easy, Medium, Hard, Very Hard, and Impoppable. Unlike the BTD games, the player cannot select a difficulty. Instead, each tile is assigned a difficulty. The difficulty decreases as the player progresses, for example, when the player starts Pink Bloon tiles may be Impoppable, but later, the player may see a trivial MOAB tile or a easy BFB tile.

Bloons Tower Defense 6[]

There are three difficulties in BTD6 - Easy, Medium, and Hard. All difficulties have their own variations with additional changes.

  • Easy: You start with 200 lives. Towers and upgrades are 15% cheaper, bloons move a little slower.
    • Standard: Survive until Round 40 to win.
    • [Top Path #1] Primary Monkeys Only: Same as Easy - Standard, but you can only use Primary Monkeys.
    • [Top Path #2] Deflation: See Deflation Mode.
    • [Bottom Path #1] Sandbox: See Sandbox Mode. Plays Sandbox mode with Easy difficulty bloon speeds and tower costs.
  • Medium: You start with 150 lives. Towers and upgrades are their normal price, bloons move at their normal speeds and MOABs have their normal health.
    • Standard: Survive until Round 60 to win.
    • [Top Path #1] Military Monkeys Only: Same as Medium - Standard, but you can only use Military Monkeys.
    • [Top Path #2] Apopalypse: See Apopalypse Mode.
    • [Bottom Path #1] Reverse: See Reverse Mode. Bloons spawn from the exit and leave from the entrance. Also, the order of bloons sent is reversed.
    • [Bottom Path #2] Sandbox: See Sandbox Mode. Plays Sandbox mode with Medium difficulty bloon speeds and tower costs.
  • Hard: You start with 100 lives. Towers and upgrades are 8% more expensive, bloons move a little faster.
    • Standard: Start at Round 3 and survive until Round 80 to win.
    • [Top Path #1] Magic Monkeys Only: Same as Hard - Standard, but you can only use Magic Monkeys.
    • [Top Path #2] Double HP MOABs: Same as Hard - Standard, but all MOAB-class bloons have double health. This can make rounds with lots of MOABs and BFBs, especially fortified variants, extremely difficult.
    • [Top Path #3] Half Cash: Same as Hard - Standard, but you start with and earn half the cash. This also applies to cash earned from Cash Drops and continues.
    • [Bottom Path #1] Alternate Bloon Rounds: Each round now has different bloons, and camo, regrow, and lead bloons come much earlier. There are greater numbers of bloons with the fortified property too.
    • [Bottom Path #2] Impoppable: See Impoppable Difficulty. Start at Round 6 with only 1 life and survive until Round 100 to win. Unlike other Hard game modes, towers and upgrades are 20% more expensive.
    • [Bottom Path #3] CHIMPS: (No Continues, Hearts lost, Income, Monkey knowledge, Powers, or Selling.) Same as Hard - Standard, but the player starts on Round 6 and has much greater restrictions. "The ultimate test of a BTD Master," as the game itself describes the game mode. You will need to survive until Round 100 with all the rules above. See C.H.I.M.P.S. for more.
    • [Left Path #1] Sandbox: See Sandbox Mode. Plays Sandbox mode with Hard difficulty bloon speeds and tower costs.

Bloons Adventure Time TD[]

Unlike the main Bloons TD games, Bloons Adventure Time TD only bases its difficulty on the amount of starting lives, total rounds, and sometimes difficulty modifiers. After all the rounds are completed for a certain difficulty, the game is finished, and players do not have an option for Freeplay Mode.

  • Normal: 200 Lives, 30 Rounds. Awards a Bronze Chest, 300 coins and a Bronze Medal when completed. Will rarely have difficulty modifiers.
  • Hard: 150 Lives, 45 Rounds. Awards a Silver Chest, 500 coins and a Silver Medal when completed. Will sometimes have difficulty modifiers.
  • Extreme: 100 Lives, 60 Rounds. Awards a Gold Chest, 700 coins and a Gold Medal when completed. Will always have difficulty modifiers.
  • Impoppable: 1 Life, 75 Rounds. Awards a Diamond Chest, 1,000 coins and a Diamond Medal when completed. Will always have multiple difficulty modifiers.

Trivia[]

  • In BTD3, Medium prices are 2% higher than the default price.
  • It takes 42 seconds for a Red Bloon to go past the exit of Monkey Lane on Easy, 40 seconds on Medium and 38 seconds on Hard.
  • It is currently not possible to play Sandbox Mode in Impoppable (BTD6).