Weapon Damage

Weapon Damage is a stat that increases Bullet Damage, Light Melee Damage, and Heavy Melee Damage.

Headshots

Aiming for the head will deal increased damage. Troopers, Guardians, and Heroes have a weakpoint hitbox that receives approximately double base bullet damage when hit by a weapon. Seven receives reduced incoming headshot damage, as do Mo & Krill, who have a separate hitbox for each of Mo and Krill's heads.

Several items have effects that proc on headshots, such as Headshot Booster, Headhunter, and Crippling Headshot.

Math

The formula for weapon damage is: $x_{f} = x_{i} * (1 + \sum_{i = 1}^{n} Shop Bonus + \sum_{i = 1}^{n} BaseAttackDamagePercent + \sum_{i = 1}^{n} Golden Statues)$
where:
$\begin{aligned} x_{f} & = final weapon damage, \\ x_{i} & = initial weapon damage, \\ S h o p B o n u s & = Increase based on the tier, \\ B a s e A t t a c k D a m a g e P e r c e n t & = weapon damage value, \\ G o l d e n S t a t u e s & = Golden Statue value \end{aligned}$

Sources

All weapon items implicitly provide weapon damage based on tier, represented as "Shop Bonuses" in the ingame stats calculation. Tier 1 items provide +6%, Tier 2 items provide +10%, Tier 3 items provide +14%, and Tier 4 items provide +18%. The following items explicitly grant increased weapon damage:

List of items
Name	Cost	Category	Stat change
Basic Magazine	500	Weapon	+12% Weapon Damage
Close Quarters	500	Weapon	+22% Weapon Damage
High-Velocity Mag	500	Weapon	+11% Weapon Damage
Hollow Point Ward	500	Weapon	+20% Weapon Damage
Restorative Shot	500	Weapon	+3% Weapon Damage
Active Reload	1,250	Weapon	+10% Weapon Damage
Long Range	1,250	Weapon	+10% Weapon Damage
Long Range	1,250	Weapon	+30% Weapon Damage
Melee Charge	1,250	Weapon	+10% Weapon Damage
Mystic Shot	1,250	Weapon	+12% Weapon Damage
Slowing Bullets	1,250	Weapon	+16% Weapon Damage
Soul Shredder Bullets	1,250	Weapon	+7% Weapon Damage
Alchemical Fire	3,000	Weapon	+14% Weapon Damage
Escalating Resilience	3,000	Weapon	+14% Weapon Damage
Intensifying Magazine	3,000	Weapon	+20% Weapon Damage
Warp Stone	3,000	Weapon	+20% Weapon Damage
Headhunter	3,500	Weapon	+15% Weapon Damage
Point Blank	3,500	Weapon	+45% Weapon Damage
Pristine Emblem	3,500	Weapon	+25% Weapon Damage
Titanic Magazine	3,500	Weapon	+18% Weapon Damage
Sharpshooter	4,250	Weapon	+20% Weapon Damage
Sharpshooter	4,250	Weapon	+70% Weapon Damage
Spellslinger Headshots	4,250	Weapon	+12% Weapon Damage
Crippling Headshot	6,000	Weapon	+20% Weapon Damage
Silencer	6,000	Weapon	+20% Weapon Damage
Vampiric Burst	6,000	Weapon	+25% Weapon Damage
Glass Cannon	7,250	Weapon	+70% Weapon Damage
Extra Health	500	Vitality	+7% Weapon Damage
Sprint Boots	500	Vitality	+4% Weapon Damage
Bullet Armor	1,250	Vitality	+6% Weapon Damage
Combat Barrier	1,250	Vitality	+22% Weapon Damage
Debuff Reducer	1,250	Vitality	+8% Weapon Damage
Healing Nova	1,750	Vitality	+12% Weapon Damage
Fortitude	3,500	Vitality	+27% Weapon Damage
Debuff Remover	4,250	Vitality	+20% Weapon Damage
Improved Bullet Armor	4,250	Vitality	+10% Weapon Damage
Colossus	6,000	Vitality	+20% Weapon Damage
Inhibitor	6,000	Vitality	+25% Weapon Damage
Phantom Strike	6,000	Vitality	+30% Weapon Damage
Siphon Bullets	6,000	Vitality	+15% Weapon Damage
Veil Walker	6,000	Vitality	+15% Weapon Damage
Leech	7,250	Vitality	+20% Weapon Damage
Extra Charge	500	Spirit	+6% Weapon Damage
Mystic Burst	500	Spirit	+6% Weapon Damage
Duration Extender	1,250	Spirit	+8% Weapon Damage
Improved Burst	3,500	Spirit	+8% Weapon Damage
Rapid Recharge	3,500	Spirit	+18% Weapon Damage
Superior Duration	4,250	Spirit	+15% Weapon Damage
Curse	6,000	Spirit	+20% Weapon Damage
Boundless Spirit	9,500	Spirit	+30% Weapon Damage

Headshot Booster deals +40 bonus Weapon Damage with headshots.
Monster Rounds increases Weapon Damage against NPCs by +35%.
Berserker increases Weapon Damage by +5% per stack for sustaining damage, where 100 receiving damage equals one stack, maxing at ten stacks.
Headhunter additionally deals +140 bonus Weapon Damage with headshots.
Intensifying Magazine additionally increases Weapon Damage to a maximum of 60% after continuously firing for three seconds.
Pristine Emblem additionally increases Weapon Damage by +25% against enemies above 50% health.
Alchemical Fire causes enemies to receive +50% Weapon Damage from the player's team.
Glass Cannon additionally increases Weapon Damage by +10% per stack for each hero kill, maxing at seven stacks.

Map spawns

Golden Statues can provide a permanent increase: +3% Weapon Damage before 10 minutes, or +4% Weapon Damage before 30 minutes, or +7% Weapon Damage after 30 minutes.