Here are some of the upgrades in the game ( not in order):
1)Once you go out of the sewers go left ( to the curtains).
2)Before you go through the door to the arena ( surrounded by a red wall) go through the other door ( surrounded by a white wall) after you hit street level.
3)When you kill the 2nd boss, go up by the ladder and roll through the opening on the right.
4)When you found the visier but he want away, go up and you fill find an opening in the wall covered partly by curtains.
5)After you find an elevator ( before riding on it),on the 2nd or 3rd lever which will open a door ( go to the left door by puting your sword in the plates. ( Impossible to miss).
6)After finding your father's sword, you will go walking on walls and stuff outside the palace, ehile going up, you will find an opening, go through it.
Hope I helped!!
Added by: LordOfGames Jul 10th 2006, ID#22061