Defender Cheats

If you need a little extra firepower for your ship, look for a tank and pick it up. As long as you are holding the tank, it will act like a rotating turret for your ship and fire upon any enemy units that get within its range. The tank's cannons will rotate 360 degrees so it can attack enemies all around you. This is very useful if you do not want to deal with having to make constant maneuvers to avoid being hit by an enemy that is tailing you.
Game Shark Codes
Master Code (Must Be On) 0E3C7DF2 1853E59EEE9B66CA BCCC335A
Infinite Lives CE48A33A BCA9C292
Max Credits DE48A3C6 C19E7B82
Max Colonists Saved C1406BF6 BCA9C292
No Colonists Killed C1406A8E BCA99B83
No Colonists Mutated C1406AFA BCA99B83
Big Kill Bonus D1406BDA F7436482
Massive Total D1406BDE F7436482

Pick up a tank and the tank will act as a rotating turret and will
hit manti that are near to you. :)
IN-FLIGHT REPAIRS
Pick up a stationary tank-like vehicle, the one with lighting coming
out of it, and it will repair you. BE CAREFUL MANTI WILL HIT IT FROM
UNDER YOU!

Infinte ammo
infinte shield
infinte credits money
unlock all battle ships


In-flight mechanic:
In some levels there are little tank-like units that remain stationary. These are the units that shoot out the lightning and repair structures. They cannot move on their own, but you can pick them up to place them anywhere and they will slowly repair any nearby units or structures. If you pick one up and fly around with it, whenever you take on damage it will fix your ship. Be careful though, because any enemies that may shoot at you from below could hit it, and they cannot repair themselves. However, sometimes it better to leave them near your base so they will repair things as needed.

In-flight artillery:
If you need a little extra firepower for your ship, look for a tank and pick it up. As long as you are holding the tank, it will act like a rotating turret for your ship and fire upon any enemy units that get within its range. The tank's cannons will rotate 360 degrees so it can attack enemies all around you. This is very useful if you do not want to deal with having to make constant maneuvers to avoid being hit by an enemy that is tailing you.

In some levels there are little tank-like units that remain stationary. These are the units that shoot out the lightning and repair structures. They cannot move on their own, but you can pick them up to place them anywhere and they will slowly repair any nearby units or structures. If you pick one up and fly around with it, whenever you take on damage it will fix your ship. Be careful though, because any enemies that may shoot at you from below could hit it, and they cannot repair themselves. However, sometimes it better to leave them near your base so they will repair things as needed.

The little tank-like units that shoot out lightning to repair things can be picked up to repair your ship. They cannot repair themselves however, so try not to fly them into battle.