This trophy is missable and requires you to open every single chest you find in the overworld in each chapter of the game. Every chapter has 3 of them, with 5 in the post game. All must be gotten during one playthrough, so make sure you get them all or you'll need to start another run of the story. Episode 1: - By the bulletin board. - Southeast area. - In the Northeast by Amos MK III. Note that this chest may be hidden. Use L1 and R1 to see it. Episode 2: - On top of the Weapon and Armor Shop. - Southeast area. - Behind the General Store. Episode 3: - Behind the Armor Shop. - Behind the Evility Shop. - Northeast area. Episode 4: - Behind the Nurse. - Southeast area, on the stairs. - On top of the General Store. Episode 5: - Southeast in the stairs (north part). - Behind the General Store. - Southwest in a higher elevation, just south of the Dimension gate. Episode 6: - Behind the Dimension Gate. - On a higher elevation behind the Weapon Shop. - Southeast area. Episode 7: - Northwest area, on a higher elevation. - Southeast area by the lava. - Higher elevation behind the Armor Shop. Episode 8: - Southwest Area. May be hard to see. Rotate the camera if necessary. - On top of statue near the Data Shop. - Higher elevation behind the General Store and Specialty Store. Episode 9: - Behind the Data Shop. - North above the jail. Rotate the camera to see some steps. Climb up and jump across. - On top of the bulletin board. Episode 10: - To the left of the Weapon Shop. This is hard to see, so rotate the camera if needed. - Skull in the Southeast area, before the stairs. - Northwest area on a higher elevation. Post Game: - Northwest area on a higher elevation. Valvatorez needs to be at a high level to reach it (Level 3000-6000). - Southwest area on a higher elevation. Valvatorez needs to be at a high level to reach it (Level 3000-6000). - Southeast of the Data Shop. - On top of Statue in the middle of the base. It is possible to reach using a running jump from the top of the steps. - Northeast area behind Amos MK III