Shotgun Farmers

For this achievement you need to be on the map Graveside and kill 5 players with the pumpkins (bombkins) dotted around the map.

The easiest way to do this is with a friend but can also be done quite easily with bots.

Match settings with friend:

Mode: Free for all
Time limit: 10 (could be 5 too its up to you).
Max players: 2
Leave private match unticked
Leave require password unticked.
Map selection Graveside.

Just spawn in and meet up next to a bombkin (pumpkin on the floor) and shoot it to kill your friend. Take it turns until the achievement pops.

With bots the match settings will be:
Mode: Capture the pig
Time limit: 10 (could be 5 too its up to you).
Max players: 2
Allow bots: tick this box
Leave private match unticked
Leave require password unticked.
Map selection Graveside.

Go to capture the bots pig and just jump off it by pressing A near a bombkin. This will draw the bot towards it. Once the bot gets near just shoot the bombkin. Find 4 more bombkins and repeat for the achievement.

Happy hunting!