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