On top of the original storyline, the numerous expansion packs have added in-depth sub-plots into the game. The "Rise of the Zilart", the "Chains of Promathia", and the "Treasures of Aht-Urghan" all present new challenges, storylines, and rewards to the players who dare to complete them. The storyline is one of the finest qualities about FFXI, as it provides even the highest level players with something to do after they've hit the level cap.