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Game.

osu!
This is a workshop item that contains 18 levels, the majority of them being Insanium.
There is atleast one of every difficulty, atleast from what I know.
I have honestly forgotten exactly what I made, so expect whatever.
I know that there are ones with the bosses from Chapter 5, and I know that there are giant battles with allies.
that is all I know, however, so if you'd like to know exactly what lies in this creation, you must find out for yourself.