Who is Aaron Greenberg? Those that are not gamers would likely ask that question, but Aaron is the head of Xbox Game Marketing at Microsoft. His twitter account is like an Xbox gamer's paradise, as he is constantly running contests for freebies and dropping Xbox gaming news to his 30K+ followers. The latest ongoing giveaway is for free codes for the upcoming The Division Beta. So if you are an Xbox fan, I encourage you to follow Aaron as you never know what goodies he will post next.