Heavy Hitter is a skill in Fallout: Brotherhood of Steel and that was to appear in Fallout: Brotherhood of Steel 2 (skills in these games work like perks do in other Fallout games).
Each level of this skill increases the player characters Critical Chance by +5% (up to a maximum +25) when using blunt weapons. To take the skill, the player must be Level 5.
Unspecified increase in Critical Chance when using hammers.[1]
