Unlockable: Rayman Fist
This is located in the Catacombs. Because the Dahaka is chasing you,
consider using slow time to escape him. Get to the section where you
have to pull three stones out of the wall to raise the central area.
After pulling the first, go to the stairway, make a right, run on two
walls and jump to the bar on the right side. Swing from the bar and
follow the path and make a quick left. The fist is in a weapon rack to
the left. The Rayman fist is unbreakable with a high attack rate but
does little damage. If you throw it, you lose it forever.

Unlockable: Hockey Stick
After you obtain the Scorpion sword find your way back to the central
room. Turn the turnstile so that the lever is facing the doorway with
the save point fountain. Stand facing the opposite doorway and walk up a
bit and to the right. You will find a ledge that is one step lower than
the area around you. Walk down and grab on to it. Jump to the opposite
ledge and jump back and forth to slowly make your way down. Once you
reach the bottom drop down to the ledge below it. Wall run to the next
wall and get ready to jump off and back and forth to make your way up.
Wall run again and when you reach the end wall jump to slow your descent
once more, you'll eventually grab onto a ledge. Make your way to the
doorway that is next to it, but DON'T GO IN. Instead keep going on the
rocks until you see the area where sand is falling. With the scorpion
sword in hand break the wall. Break the rack of weapons and pick up the
hockey stick.

As with all special weapons the hockey stick is unbreakable, but if you
throw it you lose it for good. It has moderate damage and a relatively
slow attack rate.

Unlockable: Secret Ending
To get the secret ending simply obtain all 9 life upgrades, when you get
to the room before the Empress' throne room there will be a new sword
waiting for you. It is the water sword and said to be the only thing
that can kill the Dahaka. For your final battle, instead of fighting the
Empress you fight the Dahaka.

The Dahaka’s attacks are repetitive and predictable. When far away he
will shoot his tendrils throw the ground up at you, run around in
circles to avoid it making your way ever closer to him. If you get too
close he'll shoot out his tendrils directly at you, roll to dodge them.
As you roll slow down time and go in for some heavy combo hitting, as
you get him lower in health the Empress will help you and shoot him off
the arena, he will be stuck on the ledge, stock up on sand tanks (They
regenerate around the arena) and slow down time or use Ravages of time
to inflict maximum damage. He'll eventually get back up and jump at you,
constantly roll until he calms down and remains stationary. Repeat the
same method as before until he is defeated.

Hint: Life Upgrade Pedestals

• Upgrade Pedestal 1:
  The first upgrade pedestal is right after you beat Shahdee. Walk up the
  stairs and you will see a tall altar. Pull it back to open a secret
  doorway behind it. Follow it throw avoiding the traps to obtain the
  first life upgrade.
  
• Upgrade Pedestal 2 (Past): The second upgrade pedestal is in the
  area where you first fight the Crow Master. Make your way up the area to
  the stairway. You'll see a small metal grate. At the bottom of the
  stores to the left there are some barrels and a switch. Hit the switch,
  slow down time and make your way to the grate, roll under it. Go through
  avoiding traps to get the second life upgrade.
  
• Upgrade Pedestal 3: When you reach the central hall after obtaining
  the serpent sword turn the turnstile lever so that it faces the doorway
  with the save point fountain. Facing the opposite doorway walk foreword
  and to the right, you'll see a ledge. Drop down and wall jump back and
  forth to make your way slowly down. Once you get down, drop down to the
  ledge below and wall run and jump off at the end and jump side to side
  to make your way up. Wall run again and at the end wall jump from side
  to side to make your way down to a ledge. Make your way to the doorway
  go through and avoid the traps for the third upgrade pedestal.
  
• Upgrade Pedestal 4:When in the Mechanical tower you will eventually
  reach a Thrall who is throwing spike beasts. Get him to blow up the left
  wall (Your left when facing the Thrall) Walk throw and avoid traps to
  get the fourth upgrade pedestal
  
• Upgrade Pedestal 5: When you get to the Garden in which you see the
  whole breathtaking scene make your way up to where you fight Silhouettes
  and Keepers. Walk to the left to find a ledge where the fence doesn't
  continue, drop down, move, drop down and wall run to make your way to
  the doorway across the gap. Walk in, make your way through avoiding
  traps to find the fifth upgrade pedestal.
  
• Upgrade Pedestal 6: Once you turn on the water in Garden works via
  turnstile, wall run up the wall behind it, walk in make your way through
  avoiding traps to find the sixth upgrade pedestal.
  
• Upgrade Pedestal 7: In the Prison area after you beat Thrall and
  make your way up. Make your way to the end of the left side and break a
  wall, you'll see a door. Head to the right side and midway throw you'll
  see another cracked wall. Break it hit the switch slow down time and
  make your way to the first wall you broke head throw and avoiding traps
  to find the sevenths life upgrade pedestal.
  
• Upgrade Pedestal 8: Inside the library when you make your way up
  from the walkways beneath it. You see a broken doorway, make your way
  throw it and get to the railings. You need to jump to the other one and
  instead of heading to the ledge to the left, head to the opposing
  doorway (which is still intact) Jump to the ledge and make your way to
  the right side, jump up, and go through to find your way to the eight
  life upgrade pedestal.
  
• Upgrade Pedestal 9: The ninth pedestal is located in the room in
  which you chase Shahdee and she shuts the door behind her. You are
  required to make your way up and to jump on a bar to open the door, as
  you make your way up you'll see a cracked grating. Come back here when
  you have the scorpion sword and break the grate to reveal a crate. Bring
  the crate out to the left wall, jump on it, wall run up and jump off to
  reach a ledge above it. Follow the area throw to make your way to the
  ninth upgrade pedestal.
  
• With all pedestals found you will be able to get the Water sword
  which is in the room before the throne room. It will be in the center.
  The Water Sword gives you an alternate ending as it is the only weapon
  capable of defeating the Dahaka.
  

Unlockable: Light Sword
The light sword is the most powerful secondary weapon in the game. When
in the mystic caves you come upon a door that you must unlock via
switch. Directly after that door there is a drop in the floor. Drop down
and break the left wall and break the rack to pick up the light sword.
As with all secondary weapons it is unbreakable, but if you throw it you
lose it for good. The light sword has maximum damage and maximum attack
rate.

Unlock Teddy Bear
One of the miscellaneous secondary weapons is the teddy bear. Locate it
after earning the Scorpion Sword in the clock (west) tower. There are
three encounters with a giant golem enemy in the clocktower when you
initially go through it; the first is before you start negotiating the
vertical climbing of the tower (past); the second is atop the clock
tower (past); the third is is stationary and throws exploding monsters
in the clock tower's second area (past).

Look for the room where the second giant golem enemy is. You will need
to be in the present (so find a time portal) and drop into the
water-filled dead end past the golem's room. Break the wall and retrieve
the teddy bear.

The teddy bear is almost unbreakable and does almost no damage, but has
the ability to restore lost life to the Prince with each successful blow
on an enemy.