A proper Waaagh! is a Games for Windows – LIVE achievement worth 20G in Dawn of War II.
Getting it[]
You must play 20 ranked multiplayer games (the ones available under "Find Game" in the "Multiplayer" menu) with the Orks. Note that you cannot (and should not, even if you could) just start a game and quit instantly to collect games. This will not count toward the achievement, and people will be pissed.