NOTE: You do NOT have to win the match for it to count towards the achievement you simply have to stay in the match from beginning to end.
This is a very easy achievement to boost, and it is very quick to do. Should only take about 2-3 minutes per round, so you should be able to do it in under 15 minutes.
You can do this achievement with 2-8 players, meaning you can choose to either do it splitscreen by yourself (I did it this way so I know it works) or you can invite up to 7 additional people so you can help out 7 of your friends get it at the same time.
Here's how it works
Step 1: Set up a private scavenge match (so no-one can come and mess anything up for you)
Step 2: Choose Chapter 3 of The Passing titled "Port"
EDIT: Remember to change settings to single round to make things quicker.
Step 3: Select a minimum of 1 person on each team
Step 4: Invite any friends you would like to help get the achievement.
Step 5: Start the Match
Step 6: Immediately walk the human outside of the border so the match will start. Then waste the 1 minute 30 seconds however you'd like.
Step 7: The next team will need to put 1 gas can into the generator and then they will win. The closest gas can is inside the building to the right of the fence. To get the you just need to turn right when walking outside of the fence.
Step 8: Select Rematch and repeat steps 6 through 8 until the achievement pops.
SPOILER ALERT SPOILER ALERT SPOILER ALERT SPOILER ALERT
Step 9: Mourn the loss of our good friend Bill :'(
Hope this helps.