Worms W.M.D
29 Achievements
GOG
Online Warrior
Play 50 online multiplayer games.
1.1%
How to unlock the Online Warrior achievement in Worms W.M.D - Definitive Guide
You should unlock this whilst boosting for Bleating Ranker. Otherwise, just keep playing ranked or private games until the trophy unlocks. You can track this under your Profile by looking at Online stats on the right.