host first to 5 in ex or war as people are more likly to join that than a 1 round game and 5 rounds is nothing really anyway also i worked out that it takes at the most half an hour for the lobby to feel up if u go over the game isnt popluar so change the map and finally a good conection is vital as on GOW people quit if its not perfect so it will take along time to get the achievement if u got a rubbish connection 'so good luck'