This achievement is obtained by natural game progression. Without any spoilers, the achievement is usually obtained near the beginning of the game after the cut-scene where Lara is trying to make contact via a walkie talkie. If however the achievement does not pop which I know it hasn't for a lot of people (myself included), you can get around this by loading up Expeditions from the Main menu and selecting the Mode 'Chapter Replay' on 'Siberian Wilderness.' Watch the cut-scene until you gain control of Lara and give it a few seconds and the achievement should pop.