Here's how to increase Accessory Slots in Crisis Core: Final Fantasy 7 Reunion. Here's everything you need to know about upgrading your Accessory Slots in Crisis Core: Final Fantasy 7 Reunion to equip more Accessories! Accessory Slots can be extremely helpful for players. For Crisis Core: Final Fantasy VII on the PSP, a GameFAQs message board topic titled "how to get 4 accessory slots?". Hey, i'm up to the last chapter in the game and i still havnt unlocked 4 accessory slots. . How do you do it?!?!?? SwordMaster27 15 years ago#. Looking for an edge in your next fight? Learn how to get more accessory slots in Crisis Core Final Fantasy VII Reunion before it's too late. You can increase your maximum accessories and equipment slots by obtaining the Keychain and Backpack in Crisis Core Reunion.