From The Vault

Perk Bonus HtH Attacks Fallout requirements: Level 6, Agility 6 ranks: 1 benefit: Unarmed attacks take 1 AP less Fallout 2, Fallout Tactics requirements: Level 15, Agility 6 ranks: 1 benefit: Unarmed attacks take 1 AP less J.E. Sawyer's Fallout RPG requirements:  ? ranks:  ? benefit: Unarmed attacks take 1 AP less

Bonus Hand to Hand Attacks is a Fallout, Fallout 2, Fallout Tactics and J.E. Sawyer's Fallout Role-Playing Game Perk.

You have learned the secret arts of the East, or you just punch faster. In any case, your hand-to-hand attacks cost 1 AP less to perform.