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Skip to End from Peter S. Cavenas
On the next to last level, Kilmaat Colony, you can skip right to the end of the level by doing the following. When you reach the room with the bridge that has lasers on either side of you (it's relatively early in the level), look up and to the left and you can see the exit camel. You are not supposed to get the camel yet, but if you hover over to the ground right below the camel, you can jump just high enough to cheat and reach the camel. Jump straight up and at the climax of your jump, hover and hold forward. Try it a few times and you will get it!

New Option from alex.otmakhov
In options, change the a button to c, x to z, and l to r. you will get a new option called death tank.

Different Voices and Messages from J.M.Vargas
At the Saturn Option Menu, change the "Choose Language" option to either Deutsch, Spanish or French. Make sure you select either of the above language options and then exit to the CD menu. When you start the game, the intro will still be voiced in English but it will have scrolling text in the language that you chose. All the options in the menu, the descriptions of the Ankh symbols and the speeches by Ramses' head will all be in the language you chose. Italian and Japanese don't affect the game, though.

All ammo and full life from Shion
Down Right Left Up Down Right Left Up Down Right Left Down Up Left. Then, to replenish your life and ammo, simply go to the items screen and press X at the overworld map screen.

Level skip from Shion
Y,Y,Z,Z,X,X,Z,Y,X,Z,Y,X,Y,X,Z. Continue entering this code, to skip level, after level at the overhead map screen.

Pillar Drop in the Final Level from Shion
Z,X,Y,Y,X,Y,X,X,Y,Z,Z,Y,X,Z,A at the overhead map screen.