Hi, I sent you a poorly worded DM, but when you pioneer the mode you basically get to decide the rules :) But yeah the Target Marks would definitly have to be included, Kills would be hard, don't know if there are any lists of enemy counts on each level? The hardest singleplayer achivement was to get all the marks.

We are using the ingame timer so no loads or anything would count I think. I don't know anyone who's done a 360 run though so hard to say.