Actually maybe not. I was playing DoubleEXP Weekend - Grifball when the other team was MIA. Me and this one guy combined for over 300 kills. My final stats were something like
138 - 19 (I died cause of betrayals)
4 Killionares, 6 - 9 for ever other kill sprees (like Killtacualr, Killtrocity and such I don't remember the names), a bunch of overkills, something like 23 Exterminations, Rampage, Invincible yada yada. It was to much fun, best experiance by far!