Details on a new batch of Halo 3 Achievements, rumoured to have been included in the Halo 3 “Mythic” build on hand at PAX 08, have emerged via the Ascendant Justice forums. With 30 Achievements in all for a total of 750 coveted Gamerscore points, the “Mythic” something-or-other features accomplishments based on the Legendary and Heroic map packs that have already been released. For a full list, hit the jump.