i found a good trick just go to the medium house and stand in the top right room and if you have the acid bomb you can just keep shooting and it will kill like 50 people before you run out of ammo
in case you dont know it... a guys wife dies, he goes in the underworld to save it, he plays music to put Cerberous to sleep(that part changed to a gun), he gets his wife but is told that if he looks at her before he reaches the surface she dies, he looks, it ends