Plants vs. Zombies Garden Warfare

Choose Garden Ops Mode from the main menu and create a game with the following settings:

=> Level "Sharkbite Shores"

=> Difficulty "Normal"

=> Permission "Invite Only"

Choose the Peashooter and follow this solution for the best location to do it alone: Solution for Garden Crazy In Plants vs. Zombies Garden Warfare

This achievement can be unlocked by simply creating a match of Ops and putting the difficulty on Normal. I recommend keeping the server public so others can help you complete the game.