This is for a good cause, here are some details from the Microsoft (Xbox 360) website. Just thought to spread the word out for those who did not know. 


"The Fight Like A Girl Halo 3 Tournament (F.L.A.G.) is being held October 17 and 18 over Xbox LIVE. F.L.A.G. raises money for breast and cervical cancer research. Every dollar donated from the tournament goes toward finding a cure for diseases that affect thousands of women every year. Presented as an annual event by THE DON WAN and Zoom Demon, registration is now open for this year’s tournament, and it includes three different game types: free for all, 2v2, and 4v4. Join the fight, donate to a great cause, and fight like a girl in the tournament. You could also win some cool prizes from the ever-expanding list of donations"