It was the second rampage I found. You have 2:30 and 2000 bullets in an LMG that deals a pile of damage to get 75,000 for a gold (I think). I can consistently get a silver on this, but getting a gold has proven quite challenging. Does anyone have any tips or obvious things I may be missing (I'm getting to about the fourth wave with a multiplier in somewhere between the low 60s and mid 70s)? I think part of the problem may be that the big guys (minigunners and grenadiers) are only awarding 1xYY points (which may be a bug, but I'm not sure).