It is the end of the Sands of Time Trilogy.So sad.
If you beat Warrior Within without getting all of the health upgrades,you might be confused(but don't worry,once you beat the game you unlock the secret ending to WW).The Prince is returning home to Babalon with the Empress of Time,Kaileena.When you return your boat is destroyed by an unknow army and Kaileena is kidnapped.For about the first 6-7 minutes of the game,you'll be doing a lot of wall-running,jumping,and climbing.Then you'll find a dagger and get straight to the killing.In T2T,the is a stealth kill system know in this game as a "speed-kill".When you sneak-up behind a enemy,you can press the triangle button to engage a speed-kill.These might be a little hard at first since you have to press the strike button at just the right moment,and you have no sands,but you'll get it in time.
After you do a lot of killing,so puzzle solving,and trap advoiding,you'll see a new cut-scene of the Prince's arm being chained(the chain has blades on them)and you'll find out the Vizer from the first game is back.At this point Kaileena will be killed and the sands released.The Prince's arm does get infected,but when the chain breaks he escapes and has his good old Dagger of Time back.Now you'll start to hear a voice in your head,and in about 10 mins you'll find out who it is.Later you'll get to play as the Dark Prince.The Dark Prince is a "Sand Creature"that lives inside the Prince.The Prince's weakness(ruthless,reckless,and sadistic)give the DP form.
The DP's combat system is not hard at all.You'll always be losing health,and that gets frustrating when you are trying to solve puzzles as the DP.You are stronger though;you can use both the dagger and the chain on your arm.The DP is a pretty funny character.The story is good and the game will last a while(with replay value),but it's just to short.