22 Jan 2011 22 Jan 2011
As far as boosting this achievement goes I obtained it purely playing 2 player clan games.
Set the game to CTF on Backstab. There's a river that runs through this town and a bridge in the centre of the map that spans this river. Once the game starts both players run to the bridge with the winning player getting 1 kill and the loosing player quitting the match (you don't even have to wait for the loosing player to respawn).
It takes about 30 seconds a game once the game starts. Alternate the wins to keep it fair and keep going until the achievement unlocks.