Sniping
This tree focuses on guns, particularly sniper rifles, and Zer0's critical damage capabilities
| Skill | Tier | Levels | Effect |
|---|---|---|---|
 |
1 | 5 | +4% Critical Hit Damage per level. |
 |
1 | 5 | +3% Zoom and +12% Aim Steadiness (reduces aim disruption when taking damage) per level. |
 |
2 | 5 | Kill Skill. Killing an enemy gives you +10% Critical Hit Damage and +15% Reload Speed per level for a few seconds. |
 |
2 | 5 | +5% Accuracy per level. |
 |
3 | 5 | The first shot from a fully loaded magazine deals +12% Damage per level. |
 |
3 | 5 | +20% Bullet Speed, +3% Critical Hit Damage, and +2% Gun Damage per level. |
 |
3 | 1 | Shots pierce through enemies, gaining +100% damage per enemy pierced. Enemy crit locations highlighted in Decepti0n. |
 |
4 | 5 | Up to +8% Critical Hit Damage per level depending on how long you aim down the sights. |
 |
5 | 5 | +25% Hip-Shot accuracy, +10% Reload Speed, and +1 Magazine Size with Sniper Rifles per level. |
 |
6 | 1 | Scoring a Critical Hit with a sniper rifle gives you +6% Critical Hit Damage and +5% Damage with sniper rifles. Can stack up to 999 times. Stacks begin to decay if you haven't scored a critical hit after a couple seconds. |
Cunning
This tree focuses on improving Decepti0n, and abilities that benefit both ranged and melee combat.
| Skill | Tier | Levels | Effect |
|---|---|---|---|
 |
1 | 5 | +5% Reload Speed and +10% Weapon Swap Speed per level. |
 |
1 | 5 | After getting hit, your next melee attack has a chance to deal +50% damage per level. |
 |
2 | 5 | +5% Fire Rate and +3% Gun Damage per level when your shield is depleted. |
 |
2 | 5 | +4% damage per level when attacking enemies from behind or when attacking an enemy who is targeting someone other than you. |
 |
3 | 5 | Each successful ranged or melee attack gives you +2% Gun Damage and +1.8% Melee Damage per level for a short time. This bonus can stack up to 5 times. Faster weapons can gain stacks more quickly, but slower weapons retain stacks for a longer period of time. |
 |
3 | 5 | Your holographic decoy explodes when you become visible again, causing shock damage to nearby enemies. Damage increases per level. |
 |
3 | 1 | Dealing melee damage marks a target for 8 seconds. Marked targets take 20% additional damage from all sources. |
 |
4 | 5 | While Decepti0n is active you gain +2% Gun Damage, +7% Movement Speed, and regenerate 0.8% of your Maximum Health per second per level. |
 |
5 | 5 | Every time you fire you have a 6% chance per level to fire twice. |
 |
6 | 1 | Action Skill Augment. Throws a handful of Kunai knives. Has a random elemental effect. Does not take character out of Decepti0n. Can be used five times per cooldown. Can apply Death Mark. |
Bloodshed
This tree focuses on melee attacks.
| Skill | Tier | Levels | Effect |
|---|---|---|---|
 |
1 | 5 | +100% Melee Damage per level against enemies with low health. |
 |
1 | 5 | +3% Melee Damage and Maximum Health per level. |
 |
2 | 5 | Kill Skill. Killing an enemy regenerates 0.7% of your shield per second and gives +1.5% Action Skill cooldown rate per level for a few seconds. |
 |
2 | 5 | Shooting an enemy gives +6% damage per level to your next melee attack. Melee Attacks give +4% damage per level to your next gun attack. |
 |
3 | 5 | Kill Skill. Killing an enemy gives +8% Movement Speed, +6% Gun Damage, and +8% Melee Damage per level for a few seconds. |
 |
3 | 5 | Your melee attacks deal +8% damage per level when hitting an enemy in the back. |
 |
3 | 1 | Melee Override Skill. While Decepti0n is active and a target is under your crosshairs, melee to dash forward a short distance and perform a special melee attack, dealing massive damage. Has a range of 3 meters. |
 |
4 | 5 | Killing an enemy with a melee attack restores up to 4% of your health per level depending on how low your health is. |
 |
5 | 5 | +3% Gun and Melee Damage per level when moving. |
 |
6 | 1 | Killing an enemy with a Melee Attack during Decepti0n deploys an additional holographic decoy and extends the duration of Decepti0n instead of ending it. |