The Multi Player Pack Add-on for Worms Ultimate Mayhem has 6 achievements.
Play an online game on each new map and win, proving you’re the greatest general
Win a ranked Deathmatch on a new map with at least one worm ending with more health than they started with
Play each new map more than 5 times (all modes count)
Can you rise to the challenge and win a ranked Deathmatch on every new map?
Drown 20 Worms across any of the new maps
Win a ranked match with two or more worms remaining on each new map