04-06-2009, 11:54 PM
Play the attack game mode make sure you have a demolition guy, blow the wall up every time it respawns do it again, It mounts up fast. My friend did this on his own base didnt get any kills and came top. with about 4k money and got a few rank points. im not sure what being master class gets you because I have an expert crew member and hes able to use all the level 3 guns already. Maybe it adds another ability i already have 4 and there is space for 1 more.