Doom's walking/running step sound not heard due some of his powerstyle's codes has the walking and running codes from those of some flight characters like Doctor Strange and Magneto, and Doom is not flying while on the ground Doom's special dialogue with Ymir did not play due to the DLC map package file name is incorrectly 'niffleheim2_dlc' instead of 'niffleheim2b_dlc'
Strange and Clea's special dialogue script errors List of Glitches Marvel Ultimate Alliance Before listing a glitch, search for it because it may be the list.
