I had a little different approach. Played on easy with goals set to 20 and just tackled the crap out of them until I got the 2x. Score, repeat. I overkilled it a little by doing this 4 times in a game. Funny thing though...at the end of the game, the cheevo never popped. So after my WTF, I checked in the menu and it was there. At least I got the points but not hearing or seeing the pop made me feel empty inside. OK, I'm over it now.