RECALL PROTOCOL

tank

Stalwart

Siebren de Kuiper - Age 64

The Hague, Netherlands (formerly), International Space Station (formerly)

Hit Points

350
275

625350 Health - 0 Armor - 275 Shields

Sigma

Sigma

Brilliant astrophysicist Dr. Siebren de Kuiper's life changed forever when an experiment gone wrong gave him the ability to control gravity; now, Talon manipulates him to their own ends.

Hero Info

Abilities + Weapons

PRIMARY FIRE

Hyperspheres

Launch two gravitic charges that bounce off walls and implode after traveling 22 meters or hitting an enemy. Deals 20 on direct hit plus 40-12 splash damage. 0.67 shots/s, infinite ammo. Splash radius 1-2.9m. Enemies pulled slightly toward implosion center. 80.4 DPS while firing.

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PASSIVE

Role: Tank

Less ultimate given by healing and damage received. Increases base health by 150 in Role Queue game modes. Ultimate charge and perk progress from damage and healing dealt to tanks is reduced by 40%.

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PASSIVE

Sub-Role: Stalwart

Reduces knockbacks received by 40% and the effectiveness of slowing effects received by 40%.

SHIFT

Kinetic Grasp

Absorb incoming projectiles in front of you for 2 seconds and convert 60% of damage absorbed into overhealth (max 400). Cannot block beam, melee, or AoE attacks. Cannot use primary fire during. Barrier can be retracted without interrupting. 12 second cooldown.

E

Accretion

Gather debris and hurl it to knock down enemies hit. 80 damage on direct hit, 40-12 splash. 1.1 second knockdown. -75% movement speed during cast. Strong projectile — pierces Defense Matrix and similar abilities. 10 second cooldown.

SECONDARY

Experimental Barrier

Hold to propel a floating 650 HP barrier forward at 20 m/s. Release to stop. Press again to recall. 4.5m tall, 5-6.5m wide. Unlimited range. Regenerates 85.4 HP/s after being recalled for 2 seconds. Automatically recalled if hacked or eliminated.

ULTIMATE

Gravitic Flux

Take flight and target an 8m radius area to lift enemies into the air, then slam them down. Deals 50 damage on lift and 50% max HP on slam. 2.5 second suspension. Enemies are rooted during lift. Slam damage ignores all modifications. Channeled. 2300 point cost.

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PASSIVE

Tank Role Passive

Receive reduced knockback and grant less Ultimate charge to enemies from damage and healing.

PRIMARY

Hyperspheres

Launches two bouncing gravitic charges that implode after 22m or on contact. 20 direct hit + 40-12 splash damage. 0.67 shots/s (2 charges per volley). Infinite ammo. 48 m/s projectile speed. Slight pull effect on enemies hit by implosion.

Minor Perks

Kinetic Cycle

Absorbing projectiles with Kinetic Grasp reduces Accretion cooldown. Every 100 damage absorbed reduces cooldown by 2 seconds. Only granted on successful completion.

Hyper Regeneration

40% of Hyperspheres damage dealt to heroes restores Experimental Barrier health.

M

Massive Impact

Accretion knockdown duration increases to up to 3 seconds based on travel distance.

Major Perks

Hyper Strike

Every 5 direct hits with Hyperspheres, your next Quick Melee levitates and knocks away enemies, dealing 50 bonus damage over 0.37s. Knockback speed 15 m/s.

Levitation

Hold Jump while airborne to levitate and hover for a short duration. Activated with the Space key.

Patch History

2026-04-14

2 changes
NERFExperimental Barrier

(6v6) Maximum health reduced from 650 to 600.

NERFHyper Regeneration

Now restores barrier health only when damaging enemy heroes.

2026-02-10

2 changes
NERFExperimental Barrier

Barrier health reduced from 700 to 650.

Developer comment: Sigma's ability cycling can make him difficult to break through. Reducing his barrier health and Hyper Regeneration's effectiveness creates more opportunities to pressure him.
NERFHyper Regeneration

Barrier health conversion rate reduced from 50% to 40%.

2025-12-12

1 change
NERFHyperspheres

Impact direct damage reduced from 25 to 20.

2025-12-09

1 change
BUFFHyperspheres

Impact direct damage increased from 15 to 25.

Developer comment: Sigma can struggle to secure eliminations in certain matchups. Increasing direct impact damage rewards precision and improves key breakpoints when comboing with the rest of his kit.

2025-08-26

2 changes
BUFFHyper Regeneration

New Minor Perk. 50% of Hyperspheres' damage restores Experimental Barrier's health.

NERFMassive Impact

Removed.

46 older patches

2025-07-22

2 changes
BUFFExperimental Barrier

Deployment cooldown reduced from 2 to 1 second.

NERFMassive Impact

Knockdown stun now reaches maximum duration at 30 meters, down from 40 meters.

2025-04-22

1 change
BUFFLevitation

Jump can now be held down to hover.

2025-03-18

2 changes
BUFFAccretion

(6v6) Damage increased from 100 to 120.

NERFExperimental Barrier

(6v6) Regeneration rate reduced from 100 to 85 health per second.

2025-02-18

4 changes
BUFFLevitation

Activate and hold Double Jump to briefly levitate upward.

BUFFKinetic Cycle

Absorbing projectiles with Kinetic Grasp also reduces Accretion's cooldown.

BUFFHyper Strike

Every 5 direct hits with Hyperspheres, your next successful Quick Melee levitates and knocks away enemies.

BUFFMassive Impact

Accretion's knockdown duration increases to up to 3 seconds based on travel distance.

2024-12-17

3 changes
NERFAccretion

(6v6) Damage reduced from 120 to 100.

BUFFExperimental Barrier

(6v6) Recharge rate increased from 85 to 100 health per second.

NERFSigma

(6v6) Base shield health reduced from 275 to 250.

2024-12-10

1 change
NERFSigma

Global projectile size large reduced from 0.15 to 0.12 meters.

2024-09-17

1 change
REWORKHyperspheres

Impact damage reduced from 25 to 15. Explosion damage increased from 30 to 40. No longer deals damage to self.

Developer comment: This shift in damage from the Hyperspheres direct impact into the explosion component is to improve the effectiveness of the airburst explosion when playing at max range and makes it more threatening against tightly grouped enemies.

2024-07-09

1 change
BUFFAccretion

Impact damage increased from 40 to 80 (120 damage total).

Developer comment: Sigma is a tank that does not currently have an issue with survivability when cycling between managing his barrier, Kinetic Grasp, and weapon range. We are however increasing the damage of Accretion to bring back more of the threat it used to pose and increase the satisfaction in landing it, as it also did not benefit from the global increase to projectile sizes.

2024-05-24

1 change
NERFGravitic Flux

Gravitic Flux now requires line-of-sight to lift targets again.

Developer comment: Our last patch aimed to make some Tank ultimates more forgiving to use during combat. Sigma's Gravitic Flux can suffer from missing due to slight line of sight checks but we don't believe this change had proper communication for all instances. We may return to this change for Sigma down the line with updated visuals.

2024-05-14

1 change
BUFFGravitic Flux

No longer requires line of sight to the center of the effect.

Developer comment: Similar to how Graviton Surge functions, Gravitic Flux no longer needs line of sight to affect enemy targets in its area. There are a fair amount of counterplay options to deal with this ultimate so we're making it more reliable to grab enemy targets within its area of effect.

2024-04-16

1 change
BUFFExperimental Barrier

Movement speed increased from 16.5 to 20 meters per second.

Developer comment: This change will improve Sigma's ability to protect allies that are further away from him.

2024-02-13

1 change
BUFFSigma

Shields increased from 200 to 275.

2023-12-05

1 change
NERFExperimental Barrier

Regeneration rate reduced from 100 to 85 health per second.

Developer comment: Sigma has very effective defensive options between his Experimental Barrier and Kinetic Grasp. The barrier regeneration rate is being reduced in order to create more opportunity to attack Sigma directly.

2023-08-10

1 change
BUFFSigma

Base movement ground deceleration increased to match standard heroes movement.

Developer comment: Sigma has always had somewhat floatier movement controls than most heroes in order to match his character movement animations. However, this led players to feel like his Tank role passive ability wasn't reducing the amount he would be knocked back since it took him longer to stop than other tanks. We've now adjusted this to the standard hero movement values to make the gameplay interactions feel more consistent.

2023-04-11

1 change
REWORKAccretion

Impact damage reduced from 60 to 40 (80 damage total with explosion). Knockdown duration increased from 0.8 to 1.1 seconds.

Developer comment: Like Roadhog's Chain Hook, Sigma's Accretion and primary fire combo can be highly lethal and can feel like a guaranteed kill against 200 health targets. We're reducing the damage slightly to require an additional volley of primary fire but are also increasing the stun duration to provide allies with more opportunity to follow up on successful impacts.

2023-02-07

2 changes
NERFGravitic Flux

Ultimate cost increased 7%.

NERFSigma

Base health in non-Role Queue modes reduced from 350 to 200. Base health in Role Queue modes remains at 350.

2022-04-26

4 changes
BUFFGravitic Flux

Phase effects no longer clear the Gravitic Flux movement restriction effects. Cryo-Freeze no longer removes Gravitic Flux effect.

BUFFAccretion

Damage increased from 70 to 100.

NERFExperimental Barrier

Barrier regeneration rate reduced from 120 to 100.

BUFFSigma

Base shields increased from 100 to 200.

2021-03-11

1 change
BUFFExperimental Barrier

Cooldown reduced from 2.5 to 2.0 seconds.

Developer comment: While the previous cooldown increase for Experimental Barrier had the intended effect of opening up more counterplay, there may be a tuning value that feels less restrictive for Sigma and still achieves those goals.

2021-01-12

1 change
BUFFExperimental Barrier

Redeploy cooldown increased from 1 to 2.5 seconds.

Developer comment: We're increasing the cooldown of Sigma's barrier to require a higher commitment to its placement and open up additional opportunities for counterplay.

2020-08-13

2 changes
NERFKinetic Grasp

Cooldown increased from 10 to 12 seconds.

NERFExperimental Barrier

Health reduced from 900 to 700. Barrier health regeneration rate reduced from 120 to 80 health per second.

Developer comment: Given Sigma's offensive strength with Hyperspheres and Accretion, we have reduced some of his defensive tools to bring him more in line with other Tank heroes.

2020-04-29

1 change
REWORKAccretion

Knockdown duration is now a fixed 0.8 second instead of scaling with distance. Cast time reduced from 0.75 to 0.65 seconds.

2020-03-12

1 change
BUFFGravitic Flux

Ultimate cost reduced 10%. Flight speed increased 30%.

2020-01-28

2 changes
REWORKGravitic Flux

Can now be interrupted before targets begin falling. Impact slow duration reduced from 0.9 to 0.6 seconds.

NERFAccretion

Explosion damage reduced from 60 to 40.

2019-12-10

2 changes
BUFFKinetic Grasp

Cooldown reduced from 13 to 10 seconds. Damage-to-shield gain ratio increased from 40% to 60%.

NERFExperimental Barrier

Health reduced from 1500 to 900. Barrier health regeneration rate reduced from 150 to 120 health per second.

2019-10-15

3 changes
NERFGravitic Flux

High gravity effect duration reduced from 1.2 to 0.9 seconds.

NERFKinetic Grasp

No longer blocks Chain Hook and Whip Shot.

Developer comment: Sigma can often feel difficult to counter since he can so quickly reposition his shield and use Kinetic Grasp to block from other directions. We're opening up some weaknesses in these abilities to allow for more counter play from his enemies.
NERFExperimental Barrier

Regeneration rate reduced from 175 to 150 per second. Now has a 1 second cooldown after recalling the barrier. Initial 0.2 second cast time removed.

2019-09-17

4 changes
NERFGravitic Flux

Intro cast time increased from 0.4 to 0.6 seconds.

BUFFAccretion

Explosion damage increased from 50 to 60.

BUFFExperimental Barrier

Added a toggle option for deploying Experimental Barrier.

NERFHyperspheres

Explosion damage reduced from 35 to 30.

2019-08-13

1 change
BUFFSigma

New Hero added to the Tank roster.

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