For this achievement, you need to start 3 games with the same group of players.
To do this, you need to select "Play a Sequel" at the end of the game, which lets you play with the same group of players. Now you can do it the legit way and get a bunch of friends and have a great time playing the game.
If you don't have any friends though that's okay! This achievement can be earned solo. So if you don't have any friends you can play with, the fastest way to obtain this is to load up a solo game and get killed as fast as possible. Once you die just click "Play a Sequel" and do the same thing the second time. Once you click "Play a Sequel" for the third time, the achievement will unlock, you do not need to play through the third round, simply just start it.