How to Unlock Dark Castle in BTD6

Bloons TD6, or BTD6 for short, is a popular tower defense game on PC and mobile platforms, featuring a bunch of cute monkeys squaring off against balloons called Bloons. The game has quite a lot of maps to beat, all with varying degrees of difficulty. If you want to learn how to unlock the Dark Castle map in Bloons TD6 or BTD6, continue reading below for the answer.

How to Unlock Dark Castle in BTD6

Have you beaten all maps and still have not unlocked the Dark Castle? The game instead tells you to beat two Advanced Maps on any difficulty. If that is the case, then that means you have to beat two Advanced Maps that you have not played yet; it will unlock a new Expert Map in BTD6 for you.

The Bloons community considers the Dark Castle one of the easiest Expert Maps in the game because it only features a single exit path and plenty of room to build Towers with an unobtrusive line of sight. Keep in mind that all Heroes level up faster in Expert Maps, so buying them early will benefit you in the long run, with Quincy being one of the best starting options here.

According to the Bloons Wiki, a 2/0/4 Sub and a Quincy with essential Monkey Knowledge can easily solo Dark Castle in Easy. Meanwhile, in Medium, you will want to run Quincy and a 0/4/2 Buccaneer. Don’t forget to cut down the trees if you plan to use Pre-Emptive Strike. Otherwise, it will not deal any damage. And lastly, area-of-effect damages like Mortar Shellings and Recursive Cluster are highly effective since the Bloons are all grouped together at the intersection of the paths.

Dark Castle Monkey Money Rewards

	Easy	Medium	Hard	Impoppable
First Completion	$300	$500	$800	$1,200
Second+ Time	$60	$100	$160	$240
First Completion (BTD6+)	$450	$750	$1,200	$1,800
Second+ Time (BTD6+)	$90	$150	$240	$360