This is a sub-series within the wider Prince of Persia franchise.
The Sands of Time
A young Prince goes to Azad and sees it in war. He goes to the palace and opens the Sands of Time.
The Forgotten Sands
The Prince arrives at his brother, Malik's kingdom.
After seven years, the Prince became a bloodlust man. He was chased by the Dahaka. He went into the Island of Time to change his fate.
The Two Thrones
The Prince and Kaileena returned to Babylon and noticed it was in war. The Prince got personally split into two. The first half was his "Sands of Time" side and the second half was his "Warrior Within" side.