This is completed by doing the environmental challenges found throughout the game. There are 13 of them total. They include a variety of things such as breaking totems, burning old propaganda posters, breaking alarms, and then finding and collecting a few things.
Due to the nature of Tomb Raider, you should do this naturally by just exploring and really getting into the mood of the game. If you, however, don't feel the need to explore a game about exploring or just don't have the time and want the achievements... IGN has a wonderful guide to the locations of these. With some videos. https://www.ign.com/wikis/tomb-raider/Challenges