Well, not only are you seriously gimped by not having any weapon perks (only available through Competitive, stupidly enough), and the second perk slot unlocked (level 12 I believe), I don't think it's possible to finish Exterminatus with less than 4. There are some stages later on that require you to activate multiple control points at once, and unless they scale objectives with the number of players (which I doubt), it is probably not possible to do in the time required.NullPointer said:Unless I'm missing something. Is anybody able to get far into Exterminatus with less than four players? For my attempt last night it was me, at 3rd level and a friend at 5th level. We got smoked in the third wave every time.