Level Skip
     Face absolute north and go into the inventory, then to load game.
Press and hold L + I + F + T.

All Weapons
     Face  absolute  north  and  go  into the inventory, then to large
medipak. Press and hold C + T + R + L.

All Items
     Face  absolute  north  and  go  into the inventory, then to small
medipak. Press and hold A + L + T + G + R.

God Mode
     Face  absolute  north  and go into the inventory, then to flares.
Press and hold F + I + R + E.