Invincible:
 80077988 01F4

Unlimited Psionic:
 80077990 0028

Infinite Ammo 18MM Guns:
 80056D5C 0014

Infinite Ammo Phase Guns:
 80056D60 0014

Infinite HiFreq Ammo Phase Guns:
 800567D4 0014

Infinite Ammo AM Blaster Guns:
 80056D70 0014

Infinite Ammo Lock On Gun:
 80056D68 0014

Enable 18mm Automatic:
 80077424 0001

Enable Phase Rifle:
 8007742A 0001

Enable Phase Repeator:
 8007742C 0001

Enable Lock-On Cannon:
 80077430 0001

Enable AM Blaster:
 80077434 0001

Enable AM Cyclone:
 80077438 0001

Enable Zodiac:
 8007743C 0001

Enable Plasma Lance:
 80077440 0001

Rapid Fire:
 800779A8 0000

Note : I have been informed that these codes do not work with the German version of the game.