Key Items are unique, non-consumable items that are essential for story progression, unlocking new areas, or activating specific mechanics. These include things like 'Gate Seals' which are used to open temporal gates to new time periods, or 'Graviton Cores' which power certain devices. Fragments, while also key items, are a special category of collectibles. There are 160 Fragments in total, each representing a piece of the fractured timeline. Collecting Fragments is crucial for unlocking special abilities, bonuses, and even new game+ options. Many Fragments are earned by completing side quests, solving 'Temporal Rifts' and 'Paradox Anomalies,' or defeating powerful optional bosses. The 'Paradox Scope' is another important key item, allowing you to trigger Paradox Endings. Always check your Key Items menu to keep track of your progress and understand what you need to do next to advance the story or unlock new content. Mog's 'Mog Hunt' ability can often reveal hidden key items or Fragments.
