It's based on the TV show's canon. Also I agree that they have some really weird ass looking concept art for some of the human equipment. My guess is that they are going to explain it by either saying it was deciphered from the Asgard core (if the last few seasons with the Ori arc are even in it... [it'd be for the better if not and with the Asgard class that's my assumption]) or, more likely, adapted it from the other races or ancient technology. Still, after looking at more info on the game I'm not sure that they are going a reasonable or good way with the StarGate IP. The gameplay might end up being good but it looks like it takes some serious liberties with the IP, likely for the sake of balance but liberties none the less. That said, that's about what I expected so it might end up being fun (I'm doubtful seeing as I've yet to find an MMO that was fun enough to pay for [haven't enjoyed most I've played at all] and the top of my list is EVE).