All Cheats unlocked:
 8006FF20 FFFF

Endlesss Ego:
 800E9D32 2710

Endless Air:
 800E9F52 2E85

Armor-Vest:
 800E9F50 2710

Level Item:
 800EA1680002

Stop Timer:
 800EA164 0000
 800EA166 0000

Endless Continues:
 300EA17B 0000

All Secrets:
 300EA17A 0003

All Weapons:
 800EA040 0001
800EA030 0001
800EA028 0001
800EA038 0001
800EA048 0001
800EA088 0001
800EA058 0001
800EA080 0001
800EA060 0001
800EA020 0001
800EA078 0001
800EA050 0001

Endless Ammo for all Weapons:
 800EA042 00C8
800EA032 0014
800EA082 001E
800EA05A 0064
800EA08A 0096
800EA04A 0008
800EA03A 0096
800EA02A 0096
800FB368 4000
800EA06A 0014
800EA012 00C8
800EA072 000F
800EA022 0096
800EA01A 004B
800EA07A 0032
800EA052 00C8

Endless Health:
 800E9D32 4E20

Endless Armor:
 800E9F50 4E20

Get Jetpack:
 800EA124 0001

Endless Jetpack:
 800EA126 7FFF

Get Biomask:
 800EA128 0001

Endless Biomask:
 800EA12A 7FFF

Get Goggles:
 800EA12C 0001

Endless Goggles:
 800EA12E 7FFF

Get Steroids:
 800EA130 0001

Endless Steroids:
 800EA132 7FFF

Get Duke's Bio:
 800EA134 0001

Endless Duke's Bio:
 800EA136 7FFF

Get Detonator:
 800EA138 0001

Endless Detonators:
 800EA13A 7FFF

Load Game on Final Level:
 800FE808 000E

All Levels Unlocked on Start:
 800FE80A 000E