This is a useful glitch to use for traveling. Before you enter the VTOL, turn into a Hovertank . When you exit the VTOL on the next level, you will look like a normal landtank, but you will act like a Hovertank. You will be a bit faster than the normal Hovertank, but will still have the hovering ability.
When the VTOL lands you in Campaign 6, move forward to get out of the VTOL . For instance, if you are facing north, get down from the building and turn east. Go to the nearest road and keep going until you are a bit away from the wall/fence. Shoot a Tether-Guided missile over the fence and pitch it down. On your left you should see garages with ammo in them and a road to this Mysterious area. When you go to search the road there is nothing; however stay there. After that, go back west until you come in front of the building. Face north again and keep going to the other side of the city (watch out for enemies). When you arrive, turn west and shoot a Tether-Guided missile to the west. Again, keep guiding until you go over the fence you should see two enemies to your right or in front of you.
Press CTRL + X during game play to display the cheat prompt, then activate the following cheats by entering the corresponding codes:
CHEAT FUNCTION - CHEAT CODE Invincibility - Cavalry or CAVALRY All weapons - Hemmit Full shields - Medic Full health - HEALTH Unlimited ammuntion - Ammo or AMMO Invisible - invisibility Extra hover tech - Killjoy
Note: A tether-guided missile or nuke is required. You can use the Hemmit code to get those weapons. Just before the end of any level when you get picked up, go to the VTOL and wait for it to land. Turn around, arm the tether-guided weapon, and go backwards into the VTOL. Just before you actually enter the VTOL, launch the tether-guided weapon. If done correctly the screen will turn green and black. It will not crash the game and you will continue to the next screen as normal.