This pretty much like the Armored Vehicle fight. You can either take care of the enemies or you can take the chopper down. The fastest way is to take care of the enemies so let’s get started. Start by staying in the same area you start (behind the tree) and look north to see the enemy soldiers. Take out your M16A1 or your Twin Barrel and kill them all. Wait for the chopper to fly on to the east side and it’ll drop down several more soldiers.
As the chopper is doing that take out your launcher beforehand and as the soldiers appear, shoot the launcher to kill all or most of them. Hide behind the tree again and always have this tree between you and the chopper. If any soldier survives this use your M16A1 and take him out. Do this over and over until the commander appears on top of the chopper.
When the chopper is still, shoot a single LAW/RPG2 missile and the commander will die. Pretty neat, huh?! Another good tip is that if you brought the LAW and the RPG2 and soldiers survive, take out your shield and the Grenades and use these while you protect yourself with the shield. This is actually an easier fight than the
one with PUPA.
After the fight you’ll receive Sneaking Suit and you’ll be able to develop FIM-43 .