Shadow Man Achievement
I can't make videos so I'll do my best to describe the walk-thru. Videos we're not available yet at the time I made this, So if one is out already then just look at his solution if you prefer. If you vote negative, at least tell me why so I can improve this.
This is on "Last Rights" Mission. After a cut-scene radio communications with Diaz, you'll be inside a small library as a starting point. when you come out you are to head to the tunnel as part of the objective. This will be a dark tunnel so you can stay in the shadows and not get detected. If you do get detected, just reload checkpoint and you will start in this room again
I broke this down in 2 parts.
1st part is when you come out of the library/checkpoint, you will need to get past 5 soldiers. The first 3 will be slightly isolated so you can kill them one by one. The next 2 will be talking to each other. One is repairing something. The other one standing up. Wait for them to split up before killing them.
2nd part there will be 6 soldiers. The first 4 will be walking toward the camp-fire where you shoot the last 2 soldiers from the first part. Stay in the shadows and do not engage! They have flash lights so position yourself carefully. When they are all facing the camp-fire, carefully leave the area and take out the last 2 guards who are isolated. When you come out of the tunnel the game will save a checkpoint and the achievement will pop.
Some Notes:
-Remember to switch on/off your thermal vision to check if you're in a dark spot to avoid detection as well as easily spot some of the guards in the shadows.
-Some soldiers have flash-lights attached to their front so be careful when they face you.
- The soldiers are not wearing NVG's so staying in the shadow helps.