Spoiler:

>! When you defeat the God King, he explains that he was the only thing stopping creatures even more powerful than he from coming after you. This sets up for the additional chapters planned, where you delve into the dungeons of the castle to fight the Titans.

Additional spoiler:
>! After the credits roll, there's an additional cutscene where you find a control panel of the God-King's throne that activates some kind of time-machine/dimensional portal. The character advancement screen appears, and the next bloodline begins. You don't find out what the portal's for.

Video spoilers:

>! See the [ending](http://www.youtube.com/watch?v=6YFUu66_5m0&feature=related) and the [after-credits cutscene](http://www.youtube.com/watch?v=bq1IKwfc5Vg&feature=related) on YouTube.

Also, you get an achievement.