There are 4 circles on the running track where Bloons travel, hence the name of this map. Bloons enter from the top-center-right, make a half-loop counterclockwise around the top-right circle, a 3-quarters loop around the bottom-right circle, a full loop around the top-left circle, a 3-quarters loop around the bottom-left circle, and a half-loop around the top-right circle before exiting to the right of the entrance. There are two pools for water towers, one in the top-left circle and one in the bottom-right circle. There is a clock at the right that shows how long the game has been running. It is recorded in minutes:seconds, is affected by fast forward, and resets after 1 hour.
Strategy
Four Circles's central spot is optimal, with towers there gaining good coverage of 4 different sectors of the map and able to take advantage of multiple straight lines. Due to that, and its long length, Four Circles is widely seen as one of the least difficult maps in BTD6. All game modes can be beaten easily with general guidelines listed here.
At the central spot, MOAB Domination's Kylie attack can be thrown down many different straight lines, cleaning up large clumps of low-tier MOABs and Bloons with ease. The MOAB Press attack gains practically map-wide coverage, wiping out large clumps of high-tier blimps easily. With these capabilities, MOAB Domination trivializes the entire late-game.
In the central spot, Glaive Lord's spinning rangs perform well and cleans up large clumps of MOABs and ceramics. At that spot, Glaive Lord's wide coverage of the map also allows it to constantly throw ricocheting rangs, which repeatedly bounce around the map and deal solid overall damage.
Basic Deflation strategies
Basic Apopalypse strategies
Basic Half Cash strategies
Basic Alternate Bloons Rounds strategies
Basic Impoppable strategies
Basic CHIMPS strategies
Easter theme
Fireworks theme
Halloween theme
Holiday theme
Island statue
