1. Destroy drone guns: easy, medium, hard 
2. Eliminate Xenia: easy, medium, hard 
3. Blow up ammo dump: medium, hard 
4. Escort Natalya to Janus base: easy, medium, hard 

Transfer interrupted!

Start by moving just into the jungle landscape, about six steps. A handful of military men come at you with US AR33 Assault rifles in hand. Kill the first one and pick up his rifle, then kill the others. Use trees as hiding spots, and progress through the mission constantly looking for new trees to hide behind. In less than a minute you'll find the first automatic turret. or it may find you first. Hide behind a tree, and use the leaning approach. Take a few seconds after it finishes firing. Then lean out and shoot it. After the first automatic weapon is destroyed, go to the far left jungle wall and pick up body armor near a fern and a few trees. 

Progress through the jungle hiding and searching, and you'll find two more turrets surrounded by soldiers. There is body armor on the right of the second one and to the left of the third one. Each vest is very close to the jungle 'wall.' Stay as healthy as possible, you'll need it for later. 

After the three turrets, you'll come to a hanging bridge. Run across it until you hear a change in the music. Xenia will say something cliche like, "This time the pleasure will be all mine," and will shoot and roll a lot in the easy mode. She's easy to kill here. Just keep shooting. In medium and hard, she will throw grenades and shoot you with deadly accuracy. Shoot her and strafe, shoot and hide, and Natalya come in to help. Don't let Natalya get killed, or it's back to the drawing board. Finally Xenia will die, and you an pick up the a nifty RC-P90, the best gun of the game (at least at this point). 

Cross the bridge and take out the automatic machine gun to your immediate left. It won't activate until you pass it. Kill it first. Go to the mouth of the cave, located forward and to the right. 

In the cave, fog will hide an automatic machine gun on the left and about three to five soldiers on both sides. Find yourself a good place from which to shoot, and use the sight on your rifle to pick them off, aiming for the auto gun first. Remember to keep your shots to a minimum. Now head up a slope, taking out two to three gunmen. On the left part of the cave is a ladder. Ascend it slowly. If done right, you'll see an automatic machine gun that hasn't been activated pointed right at you. Take three shots to kill it. A bunch of crates are up there and you'll need to blow them up to meet an objective. Do it from a distance. But look to the right first because there is another automatic turret. Kill it. If you don't take the ladder route, the right path is laden with army men hiding behind steel crates. That path also leads to the same area via a different route. Either way is good, but you can eliminate the turrets that could kill you from behind by taking the left route. 

Go right and prepare for battle. There is a major stash of ammo and gunmen sitting waiting for you. Switch to the grenade launcher. Shoot one grenade into the area, one to the left, middle, and right areas. This will cause major damage, but won't kill everyone. If you wait to long, the soldiers simply replenish themselves. Seconds after the explosion, switch to the US AR33 Assault rifle or the RC-P90, and kill, kill, kill! Do it right, and there's nothing left. Again, there's not much to hide behind here, so strafe, shoot, and duck. Do it fast, too. After you've cleaned them out, you will see a cave path that leads around the right corner leading to your exit. A few soldiers will block your path, so pick them off. Enter the next room, and you're done.