Plants vs. Zombies Garden Warfare

A good way to get this is in the Gardens and Graveyards playlist as the games have the potential of lasting longer if your zombie teammates are good. The Sprint Tackle does 75 point damage so you will have to take off a little bit of health from your opponent before charging. I found it easiest to spam a Garden with a lot of players around with my primary weapon (football cannon) and then lining one or two up and charging at them.

I also was able to get this by knocking a Chomper out of the ground while burrowing. I haven't been able to confirm that no damage was done to him prior though.