What are the minimum requirements to unlock October side event/quest?

AgentWhiskey

The game has been very boring this month and the questing experience sucks a lot with parry/dex, input, and game lag issues. I want to know what are the minimum requirements that need to be reached to unlock the october quest/event (hoping there's gonna be some fun engaging content with good rewards).

Reference

https://forums.playcontestofchampions.com/en/discussion/276484/solve-the-mystery-and-save-the-contest-this-september/p1

Scarcity27

Complete all the objectives in any one difficulty, even if it's the easiest one, to unlock everything next month.
https://forums.playcontestofchampions.com/en/discussion/comment/1923658/#Comment_1923658