I know that it might come as a shock to some people, but I'm not a huge Halo buff. Don't get me wrong, the games are great in their own respect, I just don't have the time or desire to spend hours honing my FPS skills anymore. Getting pwned and t-bagged by 12 year olds really isn't my idea of fun, which is why I play a respectable game like WoW where that never happens in the battle grounds when a stupid rouge stealths up behind you....what was I talking about? Anyway, those of you that are looking for some extra Halo 3 XP might do well to hop on for a few hours today.
Looks like the guys over at Bungie are giving you a good excuse to get trashed (because lets face it, if you're a drinker you look for any holiday like Cinco de Mayo to get plastered) and play some Halo today. Today, and today only you'll be earning double XP under “Fiesta” style rule sets.
You'll need to make sure you've got the Heroic and Legendary map packs, otherwise you'll be drinking and earning regular XP.