Final Fantasy X-2 - PS2

Extra Ending:
After the beating the final boss, press X during the following cutscene for a bonus scene. If you managed to score 100% completion, there's another additional scene.

It's Never Over!:
Beat the game and enable the "New Game+" bonus at the main menu. This allows you play the game again but now your character have all the items they held when you finished the game the first time.

Thanks to Revolution readers Tony V. and XXXXXXXXXXXXXX!