*For Boosting Purposes*
For anyone looking to get this and the Warning Shots achievement, here is a simple set up to make sure it goes by easily and quickly.
Add whoever you are boosting with onto your friends list. From there, go into Multiplayer from the Main Menu screen.
On the bottom of the screen will give you the option to press
to invite friend. Invite your boosting partner and search for a DG Fighter game.
Once in the match, the player going for the victory places enough towers to survive while the other player just sit idle. Rinse and repeat for your boosting partner. Place the difficulty on Elite to make the match end even faster.