Apparently, there was a Halo 3 beta key giveaway we missed. However, not to worry, as Microsoft is letting more people register for free entry into the Halo 3 beta program. All you have to do is play Halo 2 online. According to Microsoft's new "rule of three", you need to play Halo 2 for three hours between Thursday, Feb. 1, 2007, 12:01 a.m. EST and Feb. 3, 2007, 11:59 p.m. EST. If you do, then Microsoft will allow the first 13,333 who complete the three hours to get a free registration to the Halo 3 beta program. If you miss this opportunity, buying a copy of the Xbox360 game "Crackdown" will land you a free Halo 3 beta registration. When the Halo 3 beta is released, people who have Halo 3 beta registrations can download it through Xbox Live.