Resist stacking
Resistances from different sources do not add up: each source blocks its share of the damage the others let through. 40% and 20% give 52%, not 60%.
total resistance = 1 − (1 − r₁) × (1 − r₂) × …
Checked in gameRule checked in game against the stat panel: the calculator applies it to every source.
Stacking the best resist items
The strongest items of each type, stacked. The total grows slower than the sum.
| Items | Sum | Real total |
|---|---|---|
| Bullet Resilience | 30% | 30.0% |
| Bullet Resilience and Battle Vest | 48% | 42.6% |
| Bullet Resilience, Battle Vest, and Cheat Death | 63% | 51.2% |
| Bullet Resilience, Battle Vest, Cheat Death, and Metal Skin | 75% | 57.1% |
| Spirit Resilience | 30% | 30.0% |
| Spirit Resilience and Witchmail | 52% | 45.4% |
| Spirit Resilience, Witchmail, and Enchanter's Emblem | 70% | 55.2% |
| Spirit Resilience, Witchmail, Enchanter's Emblem, and Spellbreaker | 88% | 63.3% |
Effective health
Effective health is health ÷ (1 − resistance): the damage needed to kill before resistances. With 2,500 health:
| Resistance | Effective health |
|---|---|
| 0.0% | 2,500 |
| 30.0% | 3,571 |
| 42.6% | 4,355 |
| 51.2% | 5,124 |
| 57.1% | 5,823 |
Heroes with their own resistances: Lash (10% Spirit resist) and Pocket (-15% Spirit resist).
Items with bullet resist
| Item | Tier | Souls | Resist |
|---|---|---|---|
| Bullet Resilience | T3 | 3,200 | 30% |
| Battle Vest | T2 | 1,600 | 18% |
| Cheat Death | T4 | 6,400 | 15% |
| Metal Skin | T3 | 3,200 | 12% |
| Crushing Fists | T4 | 6,400 | 12% |
| Indomitable | T4 | 6,400 | 10% |
| Vampiric Burst | T4 | 6,400 | 10% |
| Siphon Bullets | T4 | 6,400 | 10% |
| Bullet Resist Shredder | T2 | 1,600 | 9% |
| Suppressor | T2 | 1,600 | 8% |
| Berserker | T3 | 3,200 | 8% |
| Superior Duration | T3 | 3,200 | 8% |
| Melee Charge | T2 | 1,600 | 6% |
| Fleetfoot | T2 | 1,600 | 6% |
| Echo Shard | T4 | 6,400 | 5% |
Items with spirit resist
| Item | Tier | Souls | Resist |
|---|---|---|---|
| Spirit Resilience | T3 | 3,200 | 30% |
| Witchmail | T4 | 6,400 | 22% |
| Enchanter's Emblem | T2 | 1,600 | 18% |
| Spellbreaker | T4 | 6,400 | 18% |
| Escalating Exposure | T4 | 6,400 | 17% |
| Silencer | T4 | 6,400 | 12% |
| Greater Expansion | T3 | 3,200 | 10% |
| Dispel Magic | T3 | 3,200 | 10% |
| Indomitable | T4 | 6,400 | 10% |
| Healing Tempo | T4 | 6,400 | 10% |
| Infuser | T4 | 6,400 | 10% |
| Arctic Blast | T4 | 6,400 | 10% |
| Restorative Locket | T2 | 1,600 | 8% |
| Mystic Vulnerability | T2 | 1,600 | 8% |
| Blood Tribute | T3 | 3,200 | 8% |
| Cold Front | T2 | 1,600 | 6% |
| Echo Shard | T4 | 6,400 | 5% |
Resist reduction
Not checked in gameEffects that lower the target’s resist are assumed to combine like resistances, then be subtracted from its resist, which can go below 0 (rule from deadlock.wiki). Items with resist reduction:
- Crippling Headshot-16% Bullet resist
- Disarming Hex-13% Bullet resist
- Weakening Headshot-12% Bullet resist
- Bullet Resist Shredder-10% Bullet resist
- Hunter's Aura-10% Bullet resist
- Hollow Point-10% Bullet resist
- Rusted Barrel-8% Bullet resist
- Alchemical Fire-7% Bullet resist
- Stalker-6% Bullet resist
- Crushing Fists-5% Bullet resist
- Crippling Headshot-16% Spirit resist
- Spirit Rend-15% Spirit resist
- Spirit Snatch-12% Spirit resist
- Spirit Sap-9% Spirit resist
- Focus Lens-9% Spirit resist
- Spirit Shredder-8% Spirit resist
- Mystic Vulnerability-8% Spirit resist
- Escalating Exposure-8% Spirit resist
- Spirit Strike-6% Spirit resist
Other mechanics
- Souls per level (boons)35 boons, from 200 to 48,600 souls, and the gains of every hero.
- Investment bonuses and the 4.8k spikeBonuses at every threshold and the 4,800 souls spike: weapon damage 18% → 46%.
- Headshot multiplier×1.455, not ×1.65: measured in game, with every hero’s headshot damage.
- Damage falloffFull damage range of every gun, in meters (Vyper: 15 m → 33 m).
- Spirit power scalingBase and coefficient of all 164 ability values that grow with spirit power.
Game data from deadlock-api.com, synced on 10/18/2026. The tables follow every patch.