Game Clear Data

Game Clear Data is a gimmick introduced in Kingdom Hearts: Chain of Memories. It allows the player to access special features found after beating the game.

Kingdom Hearts II Final Mix
Game Clear Data is represented by a gold crown on a save file. It unlocks:
 * The Lingering Sentiment Boss Battle
 * Organization XIII Data Battles
 * More Mushroom XIII appear

Kingdom Hearts Re:Chain of Memories
Game Clear Data is represented by a gold card on a save file. It unlocks:

Sora's Game Clear Data

 * Reverse/Rebirth Mode
 * Theater Mode
 * Sora's cutscenes in Theater Mode

Riku's Game Clear Data

 * Riku's cutscenes in Theater Mode
 * New cards for Sora, including Keyblade cards from both Kingdom Hearts and Kingdom Hearts II and cards for the Organization XIII members introduced in KHII.

Kingdom Hearts 358/2 Days
Game Clear Data is again represented by gold crown. It unlocks:
 * Zero Gear is available for purchase
 * Return of the King is available for purchase
 * Sora's Awakening is available for purchase
 * Nothing to Fear is available for synthesis
 * Space in Its Place is available for synthesis
 * Flagging Winds is available for synthesis
 * Ice Breaker is available for synthesis
 * Down to Earth is available for synthesis
 * Lose Your Illusion is available for synthesis
 * Sighing of the Moon is available for synthesis
 * Tears of Flame is available for synthesis
 * Parting of Waters is available for synthesis
 * Test of Time is available for synthesis
 * Flowers Athirst is available for synthesis
 * Stolen Thunder is available for synthesis
 * Dying of the Light is available for synthesis
 * Secret Reports are unlockable
 * Theater Mode
 * Legend Rank for the file it is saved on.

Kingdom Hearts Birth by Sleep
Game Clear Data is represented by a star symbol appearing between a world name and the save point location on the load and save screen. It unlocks:
 * The Trinity Archives are selectable from the Main Menu, but only data for the stories you beat can be seen.
 * Having Clear Data for Terra, Ventus, Aqua, and the Final Episode unlocks the fight against the Vanitas Remnant and Unknown.