Judgment

Side cases are a pain to obtain in this game. You will unlock them in chapter 2 but will not be able to get this achievement for a few chapters. Side Cases are found from Yagami Detective Agency's bulletin board, Genda Law Office's secretary, Bar Tender's Bartender(get it heheh), and some are found on the street with case markers marked with ????. Chapter 2 will allow you to complete five of the ten cases required. The case with the Jacket is not completable until much later. Chapter three allows you to complete three more cases on the street. Finally Chapter four will allow you to get the last two cases on the street. If you want to get this earlier you need to have city reputation of at least 20. This will take much longer than just waiting for the on the street quest since you have to make friends to increase your reputation. to increase friend reputation you have to either eat at restaurants, or fulfil requirements by people out in the town.