Mythic (difficulty)

Mythic is a "fan-made" difficulty. To play it, Legendary and all the Skulls must be on. It is possible in Halo 2, Halo 3, Halo 3: ODST and Halo: Reach. Another short way of saying it would be "LASO", which means Legendary with All Skulls On. Although it can be beaten, the game will say "Legendary" since Mythic does not exist in the game's code. For the same reason, the difficulty does not have an icon like the official ones.

Trivia

 * On the week of January 24th to January 30th, there was a weekly challenge named Winter Contingency:LASO and it said, "Complete Winter Contingency on Legendary with all skulls on." It basically meant to complete it on Mythic. Recently, Bungie as been doing a LASO challenge every other week.