@Airth77: To begin the other modes, means arcade and classic, go in the starter screen and go in new game. Under the story mode, there will be the two modes you are searching for.
Necromancer is glitched, I tried him in all the enemies of the first zone, when he attacked them, their hp were remaining stable/they were not going down.
Fix this bug/glitch, it is annoying.
Otherwise, a good game. 4/5.
Aaaaww, I finished this game in armor games a while ago, and now I see that it also exists on kongregate with achievments. Now I have to go all over again.
Ok, maybe I was too noob at my previous comment. You could reduce the 100 fast kills badge to 50, because it is too hard right now. It actually cannot be taken because of the reload and because of the little time given between the fast kills.