yes, it was relatively a stupid question, but some aren't as informed as others... If you have common sense (lol, jk), you would have realized, yes you can buy the mythic map pack, either through the Halo Wars LE edition or you can buy it later on XBL... that or win some codes from contests!!! :D And once you get those specific codes from bungie (or from people hosting contests) you don't HAVE to buy the mythic map pack, but you can if you want to waste some money when you have the maps free =D hope that helped :)