Track

Tracks, sometimes referred to as maps, are themed arenas where you play in the Bloons Tower Defense series. You're able to place towers on these tracks, which will pop bloons which go in a prebuilt path. In every game before Bloons Tower Defense 4 HD, tracks didn't have names. Ever since Bloons Tower Defense 4, tracks have been organized by difficulty: there are beginner tracks, intermediate tracks, advanced tracks, and expert tracks. There are also extreme tracks and Co-op tracks which were introduced in later games.

Bloons Tower Defense

 * Track

Bloons Tower Defense 2

 * Easy track
 * Medium track
 * Hard track

Bloons Tower Defense 3

 * Track 1
 * Track 2
 * Track 3
 * Track 4
 * Track 5
 * Track 6
 * Track 7
 * Track 8

Beginner tracks

 * Road Track
 * Lollipop Track
 * Fireworks Track
 * Daisy Track

Intermediate tracks

 * Tap Track
 * Pool Track
 * World Track
 * Space Age Track
 * Clifftop Track

Advanced tracks

 * DNA Track
 * Stream Track
 * Grasslands Track
 * Inter-Dimensional Track

Expert tracks

 * Anthill Track
 * High-Tech Track
 * Railway Track

Bloons Tower Defense 4 Expansion tracks

 * Sandy Spiral
 * Subterrainian Sewers
 * Monkey Temple
 * Triangle of Insanity

Beginner tracks

 * Ocean Road
 * Go Bananas!
 * Military Base
 * Daisy Chain
 * Sweet Tooth
 * Firecracker
 * Trick or Treat
 * Milk 'n' Cookies

Intermediate tracks

 * Snow Monkey
 * Pool Party
 * Bee Hive
 * Pool Table
 * Blue Laser
 * World Tour
 * Cactus Creek
 * Snow Trail
 * Storm Cloud
 * Monkey Heart

Advanced tracks

 * Tannenbaum
 * Bus Route
 * River Bed
 * Lava Lake
 * DNA Test
 * Monkey Temple

Expert tracks

 * Farm Yard
 * Rail Track
 * Ant Hill

Extreme tracks

 * 1.21 Gigapops!
 * Monkeys vs Bloons
 * MOAB-y Dick
 * Bloonraker
 * Jolly Roger

Beginner tracks

 * Monkey Lane
 * Park Path
 * The Rink
 * Space Truckin'
 * Brick Wall
 * Z Factor
 * Fireworks
 * Pumpkin Patch
 * Maze
 * North Pole
 * 3 Times Around
 * Lobby
 * Skull Peak
 * Express Shipping
 * Sprint Track
 * Hill Giant
 * Snowy Backyard
 * Rabbit Holes
 * Present Delivery
 * Blooms

Intermediate tracks

 * Hearthside
 * Snake River
 * Bloon Circles
 * Archipelago
 * Dockside
 * Slalom
 * Jungle
 * Country Road
 * Ice Flow
 * Lava Fields
 * Water Hazard
 * Pyramids
 * MOAB Desert
 * Snowflake
 * River Rapids
 * Six Feet
 * Trick Or Treat

Advanced tracks

 * Mount Magma
 * Switch
 * Lightning Scar
 * Downstream
 * The Eye
 * The Great Divide
 * Scorched Earth
 * Rink Revenge
 * Dune Sea
 * Crypt Keeper
 * Candyland
 * Battle Knot

Expert tracks

 * Clock
 * Castle
 * Death Valley
 * Drag Strip
 * Tunnels
 * Tree Tops
 * Runway
 * Down The Drain
 * Spooky Castle
 * Dark Forest

Extreme tracks

 * Bloontonium Lab
 * Main Street
 * Tar Pits

Co-op tracks

 * Alpine Lake
 * Haunted Swamp
 * Cash Money
 * Spider Map

Beginner Maps

 * Monkey Lane
 * Bloom
 * Present Delivery
 * Rabbit Holes
 * Snowy Backyard
 * Sprint Track
 * Express Shipping
 * Checkers
 * Skull Peak
 * Lobby
 * 3 Times Around
 * North Pole
 * Patch
 * Maze
 * Fireworks
 * Brick Wall
 * Z Factor
 * Park Path
 * The Rink
 * Roswell
 * Space Truckin

Intermediate Maps

 * Ancient Tomb
 * Hearthside
 * Six Feet
 * River Rapids
 * Wattle Trees
 * Pyramids
 * Dune Sea
 * Lava Fields
 * Ice Flow
 * Country Road
 * Jungle
 * Workshop
 * Bloon Of Clubs
 * Archipelago
 * Bloon Circles
 * Slalom
 * Snake River
 * Dockside
 * Village Shore
 * Trick Or Treat

Advanced Maps

 * Battle Knot
 * Candyland
 * Crypt Keeper
 * Long Range
 * Water Hazard
 * Rink Revenge
 * Challenger Deep
 * Scorched Earth
 * U-Turn
 * The Great Divide
 * The Eye
 * Phase Portals
 * Lightning Scar
 * Switch
 * Mount Magma
 * Siege

Expert Maps

 * Double Double Cross
 * Tunnels
 * Castle
 * Clock
 * Drag Strip
 * Death Valley
 * Treetop
 * Runway
 * Down The Drain
 * Benguela
 * Web
 * Forest Path

Extreme Maps

 * Tar Pits
 * Main Street
 * Bloontonium Lab

Co-op tracks

 * Alpine Lake
 * Haunted Swamp
 * South Coast
 * Unfair Share
 * Cash Money
 * Spider Map