Damage AmplificationGive feedback
Damage Amplification or Damage Amp is a stat that multiplies the damage caused by the player to affected enemies and NPCs.
Damage Reduction
Damage Reduction is a negative form of Damage Amplification, that reduces the damage output of enemies or its user.
Calculation
Multiple sources of abilities and items that display damage amplification percentages (e.g., +20% Damage), do not simply add together. Instead, they stack multiplicatively, augmented.
Multiple sources of abilities and items that display damage reduction percentages (e.g., -30% Damage), simply add together. (Though this is most probably a bug)
Calculating Damage Amplification
To find your amplification, use the following formula:
Example:
- Drifter deals a base bullet damage of 41.
- Drifter's base Bloodscent amplification of 15% will increase his bullet damage from 41 to 47 (41 x 1.15 = 47.15, rounded down in game).
- Ivy casts Air Drop on Drifter to give him an additional 20% amplification.
- Drifter now deals 57 bullet damage (41 x 1.15 x 1.20 = 56.58, rounded up in game).
Calculating Damage Reduction
Notice: While Valve has stated in the May 22nd patch that Damage Reduction stacks diminishingly, this is not true. Damage Reduction still stacks additively. Unless there was a hidden patch note, it is safe to assume that this is a bug. This means that the current formula is:
Example:
- Drifter deals a base bullet damage of 41.
- Mirage casts base Fire Scarabs on Drifter, reducing his damage by 20%, decreasing his bullet damage from 41 to 33 (41 x 0.8 = 32.8, rounded up in game).
- Mirage now afflicts Drifter with Inhibitor, reducing his damage by another 30%.
- Drifter now deals 20 bullet damage (41 x 0.5 = 20.5, rounded up in game).
(Wiki admins feel free to remove this but just in case this gets fixed I'll keep it up here.)
For now this is not true, but to find your damage reduction, use the following formula:
Example:
- Drifter deals a base gun damage of 41.
- Mirage casts base Fire Scarabs on Drifter, reducing his damage by 20%, decreasing his bullet damage from 41 to 33 (41 x 0.8 = 32.8, rounded up in game).
- Mirage now afflicts Drifter with Inhibitor, reducing his damage by another 30%.
- Drifter now deals 23 bullet damage (41 x 0.56 = 22.96, rounded down in game).
Calculating Total Amplification
To find the total amplification, use the following formula:
Example:
- Drifter deals a base gun damage of 41.
- With Bloodscent, Drifter's gun damage is 47 with a 15% increase.
- Mirage now afflicts Drifter with Inhibitor and Fire Scarabs, reducing his damage by 50%.
- Drifter now deals 24 bullet damage.
Damage Reduction from self-inflicted sources of damage work the same as damage reduction does currently, they are additive. If you have Golden Goose Egg Cursed Relic, or Cheat Death (active portion), they will add onto any other damage reduction you have.
Notice: Additional Amplifications seem to interact weirdly with this formula, I assume it's wrong. Having the Air Drop on Drifter alongside the debuffs from Fire Scarabs and Inhibitor make Drifter's bullet damage 33, which is actually a 42% decrease from the amplification, not 50%. Would appreciate if someone could check into this.
Sources of Damage Amplification
Weapon and Spirit Amp
| Hero | Ability | Tier | Stat change |
|---|---|---|---|
| Drifter | Bloodscent | 0 | +15% Damage Amp on Isolated Heroes |
| 3 | +11% Damage Amp on Isolated Heroes | ||
| Infernus | Napalm | 0 | +16% Damage Amp |
| 3 | +17% Damage Amp | ||
| Ivy | Air Drop | 0 | +20% Damage Amp on Ivy and carried ally |
| Lady Geist | Malice | 0 | +7% Damage Amp per Stack |
| 3 | +8% Damage Amp per Stack | ||
| McGinnis | Spectral Wall | 1 | +20% Damage Amp |
| Mo & Krill | Scorn | 3 | +15% Damage Amp |
| Paradox | Pulse Grenade | 0 | +4% Damage Amp per Stack |
| Barrage | 0 | +6% Damage Amp per Stack | |
| 3 | +4% Damage Amp per Stack | ||
| Shiv | Killing Blow | 0 | +8% Damage Amp |
| 2 | +16% Damage Amp | ||
| Sinclair | Rabbit Hex | 0 | +15% Damage Amp |
| 3 | +7% Damage Amp | ||
| Victor | Aura of Suffering | 3 | +15% Damage Amp |
Spirit Amp
| Name | Cost | Category | Stat change |
|---|---|---|---|
| Escalating Exposure | 6,400 | Spirit | +4.5% Spirit Amp |
Sources of Damage Reduction
Weapon and Spirit Reduction
| Hero | Ability | Tier | Stat change |
|---|---|---|---|
| Mirage | Fire Scarabs | 0 | -20% Damage Reduction |
| 3 | -15% Damage Reduction |
| Name | Cost | Category | Stat change |
|---|---|---|---|
| Haunting Shot | Legendary | Weapon | -40% Damage Reduction |
| Cheat Death | 6,400 | Vitality | -60% Damage Reduction |
| Inhibitor | 6,400 | Vitality | -30% Damage Reduction |
| Golden Goose Egg | 800 | Spirit | -10% Damage Reduction |
| Cursed Relic | 6,400 | Spirit | -25% Damage Reduction |
- Cheat Death, Golden Goose Egg and Cursed Relic reduce damage dealt by its user.
Spirit Reduction
| Hero | Ability | Tier | Stat change |
|---|---|---|---|
| Infernus | Afterburn | 2 | -35% Spirit Damage Reduction |
| Name | Cost | Category | Stat change |
|---|---|---|---|
| Silencer | 6,400 | Weapon | -25% Spirit Damage Reduction |