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