Cheats:

please killall---------------------------Kill all Enemys
please refresh-------------------------Restores all Energy
please god-----------------------------God Mode
please giveall--------------------------All Weapons
please tellall---------------------------All Information
please open----------------------------Point at any locked
------------------------------------------door,it will open
please fly-------------------------------Fly Mode
please invisible------------------------Invisibility
please ghost----------------------------No clip mode

Mental Mode:

In order to unlock the coverted 'mental mode', you must first complete the game in serious mode. After the game is completed you should get a flashing message at the top of the statistics screen. MENTAL MODE is the flashing option below serious mode!

Secret Egyptian Level:

This secret can be found in the ''Tower Of Babel'' level. The sub-level (objective) is when you start looking for the 3 wisdom tablets. At the start of the sub-level (this sub-level should have you starting on a walkway/bridge; The structure in front of you should be the front of the Tower of Babel), drop down from the walkway and turn left. Head towards the long wall (at the far-end), which has drawings of a lion-type creatures all the way across it. Obviously there is going to be lots of mayhem, so try to get over there as quick as you can. At the same time, try to lure your enemies over near the wall. At the wall, stand between the 3rd and 4th drawing. When the enemies fire at you, move quickly out of the way (obviously). If they have fired at the right spot, a little passageway should now be exposed. At the end of the passageway, you should see a glowing warp circle. Go inside to find a heart and some armor (after blowing stuff up). There's also a ''movie set'' of the First Encounter, along with a beach ball!!!

PS: Along the game there are many more of those secret areas, they can be very helpful, just look for the DARK SPOTS on the WALLS!!! ;) CrE8Ta