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