Here is the full list of all 40 Prince of Persia: The Forgotten Sands achievements worth 1,000 gamerscore.
We actually have no way of knowing how you found 'em all.
Defeated Ratash in the Throne Room wihout taking any damage.
Purchased every upgrade.
Stayed on solidified water for 1 minute without backtracking using the Power of Time.
Used aerial kick 15 times.
Don't worry. We won't tell if you don't.
Killed 50 enemies in a row without taking any damage.
Completed the Enemy Tides Challenge.
Complete the game.
Finished the final battle against Ratash without taking any damage.
Reached the final fight.
Finished 5 titans with the Aerial Slash.
Upgraded one power to its highest level.
Razia becomes part of sword.
Finished off 10 enemies in a row using only the Aerial Slash.
Kicked 20 enemies off of ledges.
Defeated 50 enemies while using the Stone Armor.
Arrived in Razia's city.
Defeated 50 enemies using the Whirlwind.
Suffered defeat at Malik's hands.
Jumped on 30 enemies in a row.
Defeated 30 enemies using the Power of Flight.
Defeated 50 enemies using the Flame Trail.
Defeated Ratash?
Killed 500 enemies using the sword.
Defeated 50 enemies using the Ice Blast.
Used the Power of Time 20 times.
Used the finishing lunge 20 times.
Wall run for a total of 1/2 mile (805 meters).
Closed the fortress gates.
Performed 20 Aerial Slash attacks.
Defeated an enemy with a power attack at the end of a combo.
Found a sarcophagus.
Broke 100 things. (Feel better?)
Used the upgrade menu.
Knocked down 5 enemies with 1 kick.
Saved the Prince's life by using the Power of Time.
Discovered the true nature of Solomon's army.
Caught up to Malik.
There's no turning back now!