Sniper: Ghost Warrior walkthrough video guide: Act 3, Chapter 1: “Steal From Under Their Noses”
Your objective in Mission 9 is to find and grab the data, but first you have to get to the camp. You will come across little resistance on your way to the camp. Groups of enemies here and there as you cross the bridges. Once you reach the camp, get in the tower overlooking the camp. Then just take out all of the enemies in this area of the camp. Choose your kills carefully, as you do not want to alert other enemies and end up in a firefight with everyone. Afterwards, continue on to the next checkpoint, where you will be on your way to collect the data.
Part 2: Your final objective now is to grab the data and extract the area. Once you have collected the data, enemies will immediately be shooting and after you. I suggest getting out of here as fast as possible, I do not stop to kill anyone, and you should not either. When you jump into the water, stick to the right side as you will be more defenseless when you are more in the open of the water.
Sniper: Ghost Warrior walkthrough video guide: Act 3, Chapter 2: “The End Is Near…”
Your objective in Mission 10 is to sneak into the enemy camp without getting detected. You should have no problem doing this. You can kill enemies, as you will see I do as well. For the first part here, just stick to cover in the bushes and grass. When you come across a small camp with a helicopter in the center, I chose the right side. Make sure to advance in this area slowly, and watch the route the enemies take so you can advance unseen.
When in the water, stick close to the bridge and under it, so you do not get seen by the enemy that will sometimes look over the bridge.
Part 2: Your objective now is to locate the traitor inside the camp. You will only come across a few more enemies until which point you have found the traitor. At this point, you will have to clear your path between him and you by taking out a lot of enemies. There will be a mounted gun for you to use during this time. Once you have killed enough enemies. You will switch to another person from the resistance, for which you will have to provide support for the American sniper, whom you are and just were moments ago. Now just take all of the enemies out, use health if you need to.
Sniper: Ghost Warrior walkthrough video guide: Act 3, Chapter 3: “The Hunt Is On”
Your objective in Mission 11 is to catch the traitor. The first half you will be on a vehicle’s mounted gun on your way to catch the traitor. Shoot all enemies that block the chase to catch him. The second half you will have exited the vehicle, and will be sniping from on top of a hill. Here you will need to time your shot carefully, to shoot the specific barrel as to when it will hit the traitor’s car. Once done, head down to the bridge and take out a few more enemies and catch the traitor.
This is a very short chapter and will earn you an achievement worth 30 Gamerscore at the end.