Our guild name for all games is ALTTABME with the Abbrev. [TAB]
There is one exception to this and that is GW2 our guild name there is Arcanix with the Abbrev. [ARX]
The reason for the difference was we built our GW2 off an old guild from our WoW days and the sentimental value of that name was perfect for the genre. We realized as time went on this was a bit confusing and decided to go with our community name as a show of our pride as well as keeping things consistent.