Server currently have 3 random specials. There must be a certain amount of players before a special round can start. It's also random when a special round occurs, but it's also obvious when it occurs.
Current specials:
+ Gemini: 2 bosses at small scale
+ Chaos: Random weapons for each individual including the boss
+ Randomonium: Classes are randomly choosen, this also includes private classes such as Mocheeze, Demolator, Boat, Horse, and more
Chances of being a miniboss is 1/10 (I believe)