Successfully complete the indicated task to unlock the corresponding Avatar Award:
- Ultimate Mayhem Tee: Get any achievement in Worms: Ultimate Mayhem.
- Worm Tee: Locate the five hidden Easter Eggs in Worms: Ultimate Mayhem.
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
- Billy No Mates (50 points): Complete the single player campaign.
- Total Ranker (25 points): Win 40 ranked matches in total across 3 or more game modes .
- Grave Digger (10 points): Kill a total of 200 worms (all game modes count).
- Eggceptional (15 points): Collect all the hidden Easter eggs in the game.
- Loves Company (10 points): Complete 10 online matches.
- I am the Worminator (10 points): Kill more than 3 worms in one turn in a ranked match.
- If you build it they will die (10 points): Inflict 2000 damage in total using weapon factory builds.
- Halfway House (25 points): Complete 50 percent of the story mode.
- Boom Shake the Worm (10 points): Win a game using only Grenades and the Bazooka.
- Slide into first (10 points): Complete any mission.
- Pimp my worm (10 points): Create a team of worms with custom clothes.
Additionally, there is one secret achievement:
- Shop-a-holic (15 points): Purchase the Kitchen Sink game style.
The following achievements require the "Single Player Pack" bonus downloadable content:
- Challenge Accepted (10 points): Take your first steps on the road to glory by completing the first challenge.
- No Challenge At All (20 points): Show your mastery of the little pink fellows by completing all the challenges.
- Clock Watching (20 points): Try and beat all the set times across all the challenges.
The following achievements require the "Multiplayer Pack" bonus downloadable content:
- Alexander The Worm (15 points): Won an online game on each of the DLC maps.
- Join Me Luke (15 points): Exploited the darkside of Worms.
- Dedicated Ranker (20 points): Win 1 Ranked Deathmatch on every new map.
The following achievements require the "Customization Pack" bonus downloadable content:
- Hey Good Looking (10 points): Customise every aspect of a team using new downloads, all new clothes, speech bank and gravestone.
- Time to Get Paid (20 points): Create a new weapon using a new payload then land the winning blow with it in a ranked match.
- Oi, That's my hat! (20 points): In any online match kill an opposing Worm that is wearing the same new customised hat as you.