Go up to your
Objective. Watch
Cutscene. Do Coop
Snipe then look at
top screen and wait
until 2nd car is in
middle then shoot.
Get out to the hover
craft in other words
back down. Once down
kills and money will
appear at top left
and 30,000 will be
added. Press Start,
Quit then go to
single player
campaign mission,
and repeat for more
money.