Reach the Anderson air base | Prologue - Blacklist Zero Splinter Cell: Blacklist Guide

Note! The game allows you to skip the prologue by selecting an appropriate option after you pause the game. I recommend that you decide on this only if you have already beaten the game in the single player mode and you want to skip to the game proper as quickly as possible.

Entrance to the tunnel

Follow Victor along a linear path to the air base. After the Humvee cuts through the barrier, duck and go towards the small tunnel. After you are through the tunnel, approach Victor and give him a boost. Finally, pull up and move over to the other side of the barrier.

Stand behind the nearest cover and press the button that the game prompts you to, in order to lean against the cover. You now need to reach covers marked by the game, one after another. Each time, start by targeting a cover and press the correct button to make Sam dash to that cover. You should, eventually, make it to the wall shown in the above screenshot, i.e. exactly behind the back of the guard to the left. Follow the suggestion and open the selection wheel. Make sure that you have chosen the non-lethal variant and press the correct button/key to stun the guard to the left (if you have, inadvertently, selected the lethal variant, Sam will use his knife to kill the terrorist). Do not worry about the terrorist to the right, Victor will deal with him.