Plants vs. Zombies Garden Warfare

Simply play Suburbination on any map and run to the 3 objectives A,B and C shouldn't take more then a few games to get it done.

My video shows the achievement plus No Nacho Taco For You!

Here is a different method since this game mode has no one playing in it anymore. You have to just keep trying, and eventually, you will get a game with one other person in it. You can try and play against this other person and get the 20 captures normally, but I have found that after I manage to capture all three gardens the other player quits.

If this does happen, you can respawn from the start menu and then choose the 'change team' option at the bottom, I believe it is the right bumper. This will put you on the opposing team that has no gardens captured, so you can easily go and capture all three gardens again, and then just repeat the process. You can even do this if the other person doesn't quit, and have a team of 2 players capturing gardens against a team of 0.

As far as I can tell, only gardens that you capture will count, and it only counts when you get the little +200 coins pop-up that says 'garden captured'.