Search on the level called "Tomb of the Ancients".
After you activated the 3 platforms, go on!!!!,
continue the level, but when you need to enter on
the hole to continue the level, don't do it, turn 180º
and look the pit (isn't a landscape but...), jump and
do the helicopter to the left, you wil find a passage.
There you will find a big skull (BOOOOOOO!!!!!!!), go
on and kill the henchmens, after that you need to reach
the skull and search on his eyes, there will be it.
This only do a 100% on your rank... there's no a secret
power, or anything, I personally thinked a secret level
In order to get the most out of this title, buy a
gamepad that allows you to map its keys.
You can tell a lot from the sound in this game.
For instance, you'll be able to hear the caged Lums
cry out for help, and the music will often tell you
when a particularly nasty enemy is about to pop up.
If you see a powder keg, you will need to use it.
Glitch: Echoing Caves:
After getting all the lumz and cages in the echoing caves,
the game will state that have lumz and no cages until you go
to another stage and return.
Submitted by: BigBozoBoozeDude
Don't worry about drowning in Whale Bay.
Instead, you will automatically beat the level!!