Warhawk

This cannot be obtained in split-screen with two controllers. You'll need to either try to get 6 people to join you in a Dropship during a match or find a boosting partner in the boosting threads here: Trophy Boosting Thread. You can create a private match with a boosting partner and have a 4-player split screen on one end and a 3 player split screen on the other end. Then just have all of the players pile into a Dropship. You'll need enough controllers of course. One player will need 4 controllers and the other will need 3 controllers.