Thief is a perk in Fallout 2, Fallout 3 and Fallout Tactics.

Fallout 2 and Fallout Tactics

The blood of a thief runs through your veins. With the Thief perk, you get a one-time bonus of +10% (+10 skill points in unpatched Fallout 2) to your Sneak, Lockpick, Steal, and Traps skills. A well rounded thief is a living thief.

Fallout 3

With each rank of Thief perk, you gain an immediate bonus of 5 points to both the Sneak and Lockpick skills.

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