Obstacle

For the game mechanics in Bloons TD 6, Bloons TD Battles 2, and Bloons Adventure Time TD that are commonly referred to in-game as obstacles, see Line of sight and Removable.

Obstacles are a puzzle element in Bloons Pop!.

In the Bloonspedia, Obstacles are categorized as Bloons.

List of Obstacles

Image	Text	Bio	Best choice	Not recommended
	Brick Obstacle Stops your shots	Hit these bricks multiple times to destroy them.	Phoenix, Captain Churchill, Gwendolin, Obyn Greenfoot, Acid Gunner, Mortar Monkey	Maelstrom, Adora, Bomb Shooter, Dart Monkey, Sniper Monkey
	Rubber Obstacle Shots will bounce off this	Shots bounce off these rubber blocks with additional speed.	Lightning Storm, Captain Churchill, Obyn Greenfoot, Quincy, Striker Jones, Super Monkey	Maelstrom, Spiked Ball Storm, Ice Monkey, Sniper Monkey
	Decaying Rubber Obstacle Bouncy block that can be broken	Shots will bounce right off these blocks, but multiple hits will destroy them.	Phoenix, Spiked Ball Storm, Gwendolin, Dart Monkey, Wizard Monkey	Maelstrom, Adora, Quincy, Sniper Monkey, Super Monkey
	Metal Obstacle Tough blocker that your shots cannot break	Shoot around these blocks as they will reduce the power of your shots.	Phoenix, Captain Churchill, Gwendolin, Obyn Greenfoot, Acid Gunner, Mortar Monkey	Spiked Ball Storm, Boomerang Monkey, Dart Monkey, Sniper Monkey