: Hello,
: Hey, I have been playing a lot of fan lvls recently,
: and..is there any fan Myth level that can be
: considered as canon to the myth "mythology"
: ?
Canon, in any fictional universe, is that which the original authors or, if deceased, their estate or legal successors, have ruled to be official, word-on-high God's Honest Truth. Usually in cases of contradiction, newer materials are considered "more" canon, and with computerized materials digital media concurrently released with print is usually considered more new than print, since it's easier to change.
In Myth's case there's a catch though, because at first glance you would think this definition would include the first two games and their manuals, Tales From Myth TFL (the official comic), Chimera (the official expansion pack), and GURPS Myth (the official roleplaying adaptation). However, even though Bungie's still around, they already have a legal successor, since they sold the rights. So while the above may be considered the complete Canon List from an artistic-integrity point of view, Myth 3 is added on if you take it from a strictly legal point of view, along with all it's contradictions of previous materials.
Personally, I prefer artistry over legality, so I don't count Myth 3.
But either way, there is no such thing as canon fan creations, though Chimera is close because it was made by fans who wound up working at Bungie and got them to OK it as canon. (It doesn't have any impact on the rest of the universe anyway, so it doesn't matter either way).