Ending 1:

In order to gain the first ending of the game you must complete chapters 1-8. You do NOT need to complete the side missions for your allies, just get to chapter 8 and beat the final boss.

Ending 2:

After you beat the game the first time, go to and complete chapter 9. Beat the boss in ch.9v.5 for the second ending.

Ending 3:

Again, go to Chapter 9 and beat verse 3 within 4 minutes and 20 seconds. Roman Numeral verse IV should now be accessible; complete it and what follows is another boss fight in verse VI. Beat the boss for the third ending.

Ending 4:

To get the fourth ending you must complete all 12 chapters as well as the sub-chapters for Leonard, Arioch, and Seere. Upon completing chapter 12 you'll get the fourth ending.

Ending 5:

To get the fifth and final ending you must collect all 65 weapons. Chapter 13 will then be unlocked and you must complete that chapter for the final ending of the game.