1. Eliminate enemy personnel (x15) with machete
You will begin the mission with the machete. Simply use it to melee kill 15 enemies to complete the challenge.
2. Destroy all MPLA tanks
During the first sequence you will twice be placed in control of a helicopter and be tasked with destroying tanks on the field below. Destroy them all.
3. Eliminate enemy personnel (x5) with one mortar explosion
You will find the mortars in the first area by using the access kit on the rolled truck. Now simply toss one of these mortars into a group of enemies, if you kill 5 the challenge will be completed.
4. Sink 5 enemy vessels
Once you are on the boat, you will be attacked by a number of gunboats. Use the turrets on the boat you are on to destroy five of the six boats that appear.
5. Dive to prone on an enemy grenade and survive
You will need to dive (sprint and then hit the prone button) on top of a grenade. To survive this you are going to want to play on easy and to grab the flack jacket from the accessible box during the boat sequence.
6. Eliminate enemy personnel (x10) with animal traps
Just after the sneaking sequence, you will leave your buddies and move on by yourself. Look behind the shed nearby for an access point with the traps. Once you have laid them, you can make them more potent by interacting with them and rigging them with mortars. Using this method and with a few handy placements you can kill 4-5 bad guys with each. If you can kill 10 enemies in total, you will complete the challenge.
7. Kill (x4) enemies with one mortar primed animal trap
As above. Just after the sneaking sequence, you will leave your buddies and move on by yourself. Look behind the shed nearby for an access point with the traps. Once you have laid them, you can make them more potent by interacting with them and rigging them with mortars. Kill four enemies at once during the retreat and you'll earn this challenge.
8. Use elevated improvised positions for confirmed sniper kills (x20)
During the retreat sequence at the end of the mission, you will stop and start three times. Each time you need to stop, climb up into one of the sniper platforms and kill as many bad guys as you can before moving on. once 20 have been killed the challenge will be over.
9. Collect intel (x3)
In the field during the battle at the beginning of the mission. When you see the truck on its side on the right of the area, head over and look behind it for the enemy intelligence.
During the boat sequence. On the left hand side of the boat on the upper deck.
During the retreat. In one of the sniper towers on the right of the second area you need to defend. 10. 100% survivability rating
Complete the mission without dying.