Demigod Games (fanfic of the Heroes of Olympus Series)

After Gaea was defeated, the Heroes of Olympus thought that they have some time to rest. But the Demigod Games has started and most of them have to join the game and finish all their tasks to prove that they are the most powerful demigod in order to get the prize.

Are they ready for that? Who will become the most powerful demigod? What tasks will they face and can they survive?