Originally Posted by BSM
Yeah I just did it on hard wasn't hard at all. Luring tempest to the river was a bitch but other than that pretty easy 500 gamerscore.
Also mummy wouldn't spawn for me under city 1 no matter what I did I didn't get it until the final boss battles when that river dam is full of those red boxes.
You have to go there right after blowing up EPS1. A ? will appear next to the name City1 and you will find it under the tower. Always was there for me.