Easy achievement! Boostable. You can set this up in splitscreen with another controller. If you don't have another controller and you have friends on Xbox Live then you can ask if they wanna help you out.
1. Pick Scavenge
2. Edit settings to The Passing then choose Level: Port.
3. Change it to Single Round (to make it shorter)
4. Pick the human to go outside and just mess around for 1 minute and 30 seconds without putting in a gas can.
5. Next person that goes needs to put in 1 gas can (there's one really close to the generator.
6. Choose to Rematch
*You do not have to win all the matches, just play them for it to count.
Then after 5 rounds... Ding! Achievement unlocked
Also the person helping you also gets credit to this achievement when he or she helps boost.