Hold down the [BackSpace] key and type in KYLE. Now you should have
 full weapons, full fuel and all damage is repaired.

 The folowing codes only work in version 1.03 in single player mode:

 [Alt][Shift][I] = Current tank is invulnerable
 [Alt][Shift][D] = Instant repair on current tank
 [Alt][Shift][R] = New ammo
 [Strg][F12]     = Large map ON/OFF

 With help of Mete Iscan, miscan@superonline.com