Tale of Diep:Fortresses

Fortresses are a huge addition to the game, put exclusively into Free-For-All mode. Fortresses are gray structures that are ultimately made to form rooms. A room is a gray square with a hollow inside, and the walls are just thick enough so you can't see inside. Rooms are so big, they are EACH about the size of a Pentagon Nest... and some Fortresses can be three rooms! Only one or two Fortresses will be active at a time, and will vanish once all Boss Tanks within it have been conquered. Fortresses come in three sizes:

-Small: Has one room, and therefore one Boss Tank. Surrounded by ten Defensive Turrets.

-Average: Has two rooms, and therefore two Bosses. There is an entrance to each individual room, and then a doorway in between them WITHIN the Fortress. Guarded by 18 Defensive Turrets.

-Large: Shaped like a triangle, with the Average fortress layout on the bottom, but one more room above that, also accessible from the other two rooms. Unlike other Fortresses, you have to kill all the guarding turrets to enter. There are twenty-five of them.

Related
-See Boss Tanks and Defensive Turrets.