Tomb Raider Discussion
The trainer is not bugged, neither is your game bugged. What happened with you is, the game will not give you the "third skill tree" until you progress more into the game's story; thus, without the "third skill tree", it is impossible to acquire the "Tier 3".
He does not need to restart because his game is not bugged at all from what he stated. He just need to progress more into the story in order to acquire the "third skill tree", without the "third skill tree" it is not possible to get the "Tier 3".
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