can tell you nearly anything you may need to know about Halo. Halopedia is also a wiki, which means it's constantly expanding. It knows everything about the Halo games, books, upcoming movie, and other appearances, and with your help, it can grow even larger.
But how can one trust a wiki? Surely some crazy could come in and troll the entire place up. Well... they could, but they wouldn't get too far. Halopedia is guarded by rabid watchdog like fans who are constantly watching the Recent Changes page to check for the slightest error, either grammar or factual. Okay, that's a bit exaggerated. The real deal is that Halopedia is under almost constant watch by someone who can set everything right. With 3 very responsible sysops and a mob of other users, Halopedia is in safe hands.
Be sure to check out Halopedia and even you could find something to contribute.