Adamantium Skeleton (Fallout: The Roleplaying Game)

Adamantium Skeleton is a perk in Fallout: The Roleplaying Game.

Effects
When suffering damage, the amount of damage needed to inflict a critical hit on a limb increases by the rank in this perk. For example, with only one rank in this perk, a critical hit (and injuries) is applied to a limb with six or more damage, rather than the normal five or more.

Each time this perk is taken, the level requirement increases by three.

Behind the scenes
This perk pays homage to Marvel Comics character Wolverine, who possesses an adamantium-laced skeleton, making his bones effectively indestructible.