THE FORTRESS PART 4 (past) :

1) Redo the same way and watch the scene with the evil soldier. Go to the first
room and exit of here. You have probably notice a ledge on the left before the
next corridor (you are outside). Go to it and go up by jumping and rebounding
on the wall. Now do a wall run and kill some pirates. You find a button near a
barrel, use it and use the slow motion to reach the little fence. Inside do
lots of wall run to pass the traps. You find a life bonus. Exit of here. Go
straight and unlock a secret in the chest. Now proceed to the next corridor and
to the next room.

2) You notice now a new door has opened. Kill the guy and jump to the fountain.
Use the stairs and avoid the numerous traps. Pass between the 2 spike towers
when they reach the middle of their course and then do a wall run and jump to
grab a ledge. Pass the spike logs and avoid the traps. You reach a ladder. Use
it and jump to a lever. Go down and pass the door. You can save here. Talk to
the girl. She explains you how to open the huge door. You receive a serpent
sword.

3) In a scene you have seen where to input the sword. It is also a key, simply
go back to the previous room and input the key. You can push the lever now to
change the configuration of the room. Push this lever 2 twice and kill some
pirates.