Mission I - Sick doctors
The war provides wounds. Wounds can be healed. Healed soldiers can back to the field and still killing enemies. APR want to deprive the rebels the access to the medication. To do this, you have to destroy the trucks with nitrous oxide, which are parking near dental clinic.
Payment: 30 diamonds
When you will arrive, try to silent approach from the south. You should be close enough to shot with your sniper gun. With this tactic, you can quickly end the mission without unnecessary firefight. Find the truck with barrels, which is standing under the roof. Next use the scope and target visible fragment of the barrel. Few accurate shots should be enough to provide explosion. If you are using rocket launcher, just shot in the truck.
The friend's plan is very hard to realization, but this is the most original mission in the game. You will have to sit behind the truck's wheel and deliver the package to the particular location.
The drive to the UFLL garage is funnier that destroying the truck. Unfortunately, the truck is broken. You will have to find missing part, which is located in the package, which can be found in the post office.
The post office is surrounded by UFLL. So before you will be able to obtain the package, you will have to eliminate the enemy. In this case you have to fight with full arsenal. Use anything, you have. Sniper gun, rifles, flamethrower. Between the buildings you will find barrels with explosive substance. Shot in them, to provide bigger chaos.
Next go to the village, where is the truck is parking. Kill everybody. Try to keep distance from the truck. Don't use the flamethrower or Molotov's Cocktails. The accidental flames can destroy the truck, so you must be careful with that. When the area will be clear, enter inside truck. You have to deliver the barrels to the UFLL garage. Remember to drive careful. If you will notice any outpost, stop in safe distance, go out of the truck and eliminate enemies.
When you will close to the garage gate, the gate will open. Drive inside. Next go out of the truck. Jump on the back of the truck. Unscrew one of the valves and run from there. When the truck will explode, the area will become full of the enemies. You have to cover your friend and eliminate all of the opponents.