C.H.A.O.S.

The C.H.A.O.S., or the Creator of Havoc and All Oxygen-filled ThingS, is the true final boss of BTD6 Expansion. It is very hard to unlock. It has many forms and several parts. First, though, let's get to unlocking it...

How to Unlock It

 * 1) Get to Round 150 on Apopalypse Mode and encounter A.P.O.P.A.L.Y.P.S.E. and G.E.N.E.S.I.S. (Coming soon!) You'll need an x/5 Chaotic Monkey, as well. (Also coming soon)
 * 2) Use the Chaotic Monkey's ability, taking some DNA from both A.P.O.P.A.L.Y.P.S.E. and G.E.N.E.S.I.S., and fusing it together. Then, it has a 90% chance to give the Chaotic Monkey a random Chaotic Item that isn't an Ultimate Item, and a 10% chance to give it a Chaotic DNA, an Ultimate Item.
 * 3) Take the Chaotic DNA from the Chaotic Monkey and exit Apopalypse Mode. If you don't take it, you'll have to start over from the beginning.
 * 4) Go to a mode with A.R.I.A. and/or S.P.I.C.A. other than sandbox, and equip it to one of them. Then, it gets corrupted by dark energy, turning black for a few seconds, then creating a void with a 100px radius that shrinks by 1px a second.
 * 5) You'll need an x/4 Black Void Shooter for the next part. Use the ability, and the two voids fuse together. Now, place any tower in that void.
 * 6) Go to the Missions screen to find that you unlocked a new Special Mission!

More coming soon!