As Rick O' Connell, successfully get to Ahm Shere and go to middle of the place. Then pause game play and press Up, Down, Left, R1, R3, Triangle. You will return to the level and your energy bar will go up and remain there.

Playing as Imhotep
When you are Imhotep and find the Curse Of Death, do not bother wasting life using the curse on Bosses. It does not work.

Play as the Scorpion King
While playing the game with Rick O'Connell hold down R2 and L1 and then press triangle, triangle, square, up, left, select, circle, down. Then exit the game and start a new game when it asks which character you would like to be pick Imhotep when u start the level u will automaticly be the Scorpion King.
submitted by: Will Smith

Walk on swamp
When you are Imhotep, go to the swampy place in the jungle. For this part you will need to have to raised the block in the swamp. When you have jumped on to it (as Imhotep), use the Apis Spell. Run off the block and you will be walking on the swamp for a short amount of time. Note: Do not attempt this if you do not have much energy left. Also, do not use the Curse Of Death.

Defeating The Scorpion King
Let the Scorpion King to charge the pillars and hit his tail each time. Next, let him charge you again and attack from behind. Stand still until he gets mad and attacks with his super-slash. Run around behind him and hit his tail. When he drops, hit him in the torso. Repeat this process until he climbs the pillars again. He will attack again. Let him charge and attack from behind again. Wait as before, but longer. He will try to grab you. Move out of the way at the correct moment. He will get stuck. Hit his tail again, and then his torso. Repeat this until he climbs back up the pillars. Jonathan or Meela will bring the Spear of Osiris down and fail at trying to spear the Scorpion. Use the same tactic to hit his tail while he is stunned then get the spear and attack him.