- OrderedComa
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- Noble Member
Nothing's really changed in terms of what's accurate. All the books and games previously published are still completely reliable for the most part. Some minor stuff has been changed slightly over the years since it was all published, but most of the information is still accurate enough.
Books and games are always the most reliable source of information concerning Halo, the one exception to books I would say would be the likes of the Essential Visual Guide or the Halo Encyclopedia. Not everything in them is entirely accurate as they often contain non-canonical information or information loosely based in canon as well as the real stuff. But for the most part stuff like them are accurate enough.