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Torchlight II lets you reset the last three skill points you've spent at any time.In the first game, the developers released a mod that added a purchasable respec potion at the same time as the mod tools as an example.Played very differently in Marvel Ultimate Alliance, which allows the player to freely redistribute skill points at any Save Point, with the caveat that a skill can never be completely unlearned (must still have 1 point in it).The price increases by a couple orders of magnitude for a second reset. X-Men Legends II allowed you to redistribute skill points for a price.Diablo III allows players to reset their entire skill point allocation whenever they want and there are several encounters built around having the proper skill selections.
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There's also the Token of Absolution which is transmuted from an Essence of Hatred, Terror, and Destruction which are rarely dropped from the respective Prime Evils on Hell difficulty Diablo II added a Skill Point Reset with a patch: given as a Quest Reward for completing The Den of Evil, for each difficulty.
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