I really get stuck on Ran's operation where you have to open up the skull, and I don't know what I''m doing wrong. So could someone tell how to clear the operation?
You should check gamefaqs.com first whenever you stuck somewhere for immediate answer. It should have more than what you need. If the FAQs isn't enough, check the message boards/answers. Here is the direct link for the guide: http://db.gamefaqs.com/portable/ds/file/lifesigns_surgical_unit.txt
