Difficulty

Please see Track Difficulty if you are looking for a track's difficulty.

Track Difficulty is how challenging the track itself is. This could be for a number of reasons, including track length, amount of corners or U-turns, etc. For more on track difficulty, see the Track Difficulty page through the link below. The Game Difficulties start the player off with a certain amount of lives, as well as adjusts the cost of towers, and the number of rounds you have to pass before entering freeplay mode. In BTD5, the difficulties also adjust the speed of the bloons.

Difficulty is what determines how hard or challenging a Bloons Tower Defense game is. Difficulties were introduced in BTD2 and have been in every BTD game since. There are 3 difficulties : Easy, Medium, Hard.

Bloons Tower Defense 1

 * None - 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

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 seen in the select a track page.
 * (Easy has costs at about 85%, 200 lives and 50 rounds, Normal has 100%, 150 lives and 60 rounds and Hard has about 108%, 100 lives and 75 rounds. Same for BTD4E.)

Bloons Tower Defense 4 Expansion

 * Pick a track, then pick a difficulty
 * Again, Track Difficulty

Bloons Tower Defense 5

 * Same as BTD4 with slight speed alterations.
 * Easy finishes in 50 rounds, Medium in 65 rounds and Hard in 85 rounds.