How many bosses?

[MatTitan]

So far I have killed the first 4, the 2 in the forest, the one (the mask guy) south of the forest, the 3 in the ice area, and one in the fire area. I really don't want to miss any the first time I play through the game (if that is possible).

[Shadowspaz]

Including the free kill, there are 19. There's another one in the same area as the mask one, two more in the fire area, and there are another two in an area you haven't been to (But can always get to) yet.

The last two you can't miss, and if you've gotten all of them so far, then you get one final one after that.

[MatTitan]

Is the "free kill" the door eye thing that you have to climb in the area by the mask thing? Also where is the other boss? The only other thing I found in that area was the eye door thing.

[Shadowspaz]

Yeah, that's him. Referred to as "the Maker."

So you killed him and the mask in the cave, then? If so, that's both of them. The Maker counts as a Titan.

[Whitelink]

Don't enter the second gate until you have killed 16 titans.