Purchased all skills in all categories!

Throughout the Story, Lara will gain XP through various tasks, such as killing enemies, looting salvage, completing challenges, and clearing out Tombs. When your XP progress bar fills up, you will earn a skill point! Now, while sitting at any of the Base Camps, you will notice that you can unlock a new skill by using these skill points.

There are three different categories of skills to choose from: Survivor, Hunter, and Brawler. The Survivor skills deal with upgrading your Instinct ability and looting skills for arrows and salvage. The Hunter skill trees focuses on mastering executions with all four weapons and increasing ammo capacity. Lastly, the Brawler skill tress places an emphasis on melee counters and executions.

Overall, the first skill tree you will want to max out is either the Survivor or Hunter tree. Do NOT max out the Brawler tree until the "Former Adventurer" achievement unlocks because the final two skills will void the Dodge Counter skill and you will miss said achievement.