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. 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. 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. You can increase your maximum accessories and equipment slots by obtaining the Keychain and Backpack in Crisis Core Reunion. .