Rise of the Tomb Raider - Into Darkness Challenge Walkthrough (5 Caves Explored)

Rise of the Tomb Raider - Into Darkness Challenge: 5 Caves Explored (Soviet Installation) Completing all challenges is required for 100% game completion and to unlock the trophy / achievement "No Stone Unturned". There are 18 challenges in total. They are all based on finding or destroying a certain amount of collectibles. On the map you can see how many challenges there are per area and press triangle (PS4) / Y (XB1) to see your challenge progress. None of them are missable, you can still go bac