In Drakengard, there exists multiple endings. Just like other multiple ending games, there are certain requirements that are needed to be fullfilled in order to unlock each ending that is possible. The greater the ending, the harder it is to obtian the ending.

Ending One : There is no requirements for this ending. You simply must just complete Chapters 1-8 and you don't have to complete any side-missions for allies or anything else. Simply Defeat the Final Boss.

Ending Two : Once you have completed the game for the first time, complete Chapter IX, then all you have to do is defeat the boss in Chapter 9, Verse V for the Second Ending.

Ending Three : For the Third ending, you need to once again go through Chapter 9, but this time there is a time limit. To Unlock the third ending, you have to play through Chapter IX, Verse III and beat it within 4 minutes, 20 seconds. Once you beat Verse III, Verse IV should be available. Complete Verse IV and then defeat the Boss for the Ending.

Ending Four : To Unlock the fourth ending requires much more requirements than the previous three. Starting off, you must complete all Twelve chapters. Secondly, you have to complete all sub-chapters for Leonard, Arioch and Seere. Once you complete those chapters, you will unlock the Fourth Ending.

Ending Five : To Unlock the final ending, you must collect all 65 weapons. At that point, the 13th chapter will be unlocked and then you must complete the 13th chapter. Then you will unlock the final ending.