Here is the full list of all 29 Worms W.M.D achievements.
Reach Sheep Rank
Craft every weapon in the game
Get 80 kills in a Mech
Get 80 kills in a Tank
Get 80 kills in a Helicopter
Play 50 Online Multiplayer Games
Unlock all the Customisation Items
Get 40 kills using a Mounted Gun
Kill 20 worms with Prod
Complete all the Sub Goals
Win an Online game with all worms in Buildings
Win an online multiplayer match in Sudden Death
Kill 500 worms
Complete all Challenges
Fully customise a team of worms
Win 3 online games in a row
Complete 5 Challenges
Complete the Campaign
Complete 40 Sub Goals
Gain a Gold Medal on all Training levels
Craft 30 weapons across all game modes
Complete all Training levels
Complete 15 Campaign Missions
Collect a wanted poster
Kill 4 worms in a single turn
Play a Ranked Match
Complete all the Basic Training levels
Complete Navigation Training
Finish a game with a worm on more health than it started with