The 6th edition Apocalypse rulebook night help you with this - you will not find anywhere else as much diversity as there. It is quite logical that you can compensate the absence of rules only by yourself, inventing your own. No assets, features, formations, and so on. there you can see three missions, a ton of information on how best to organize the event itself, and some general advice. Well, then you open the Chapter Approved, because there they promised special rules for all game modes, and.
You open the Rule book to see the rules, and.
Here you have decided in the 8th edition of Warhammer 40 000 to play Apocalypse.