Sigma (Overwatch)

Siebren de Kuiper is a [[Dutch people|Dutch]] [[Astrophysics|astrophysicist]] introduced in the 2016 [[first-person shooter]] ''Overwatch''. Voiced by Boris Hiestand, he was a pioneer in his field. However after an experiment went wrong and he came into contact with a [[black hole]], he sustained psychological damage and gained the ability to manipulate gravity. Deemed too dangerous to roam freely, he was kept in a secret government mental health facility for years, where he became known only as "Subject Sigma". Discovered by the terrorist organization Talon years later, they recruited him for his abilities and knowledge, with Sigma unaware they are manipulating him to their own ends.{{cite web | url = https://playoverwatch.com/en-us/heroes/sigma | title = Sigma | date = July 23, 2019 | access-date = July 23, 2019 | work = [[Blizzard Entertainment]] | archive-date = July 23, 2019 | archive-url = https://web.archive.org/web/20190723181156/https://playoverwatch.com/en-us/heroes/sigma | url-status = live }}

Siebren de Kuiper is a [[Dutch people|Dutch]] [[Astrophysics|astrophysicist]] introduced in the 2016 [[first-person shooter]] ''Overwatch''. Voiced by Boris Hiestand, he was a pioneer in his field. However after an experiment went wrong and he came into contact with a [[black hole]], he sustained psychological damage and gained the ability to manipulate gravity. Deemed too dangerous to roam freely, he was kept in a secret government mental health facility for years, where he became known only as "Subject Sigma". Discovered by the terrorist organization Talon years later, they recruited him for his abilities and knowledge, with Sigma unaware they are manipulating him to their own ends.{{cite web | url = https://playoverwatch.com/en-us/heroes/sigma | title = Sigma | date = July 23, 2019 | access-date = July 23, 2019 | work = [[Blizzard Entertainment]] | archive-date = July 23, 2019 | archive-url = https://web.archive.org/web/20190723181156/https://playoverwatch.com/en-us/heroes/sigma | url-status = live }}

When asked if the character's mental health was the focus of his story, lead writer Michael Chu stated that not the case, and instead Sigma was focused on the accident and left him "eccentric". Chu elaborated by stating that as a result of it he views the world differently, seeing everything through a "prism of music", inspired by their discussions with real-life scientists and physicists. Despite working for Talon, Sigma is kept separated from the decision making part of the group, with Chu likening his situation to a "[[Boiling frog|frog being boiled]]". With ''Overwatch 2'', after character [[Vendetta (Overwatch)|Vendetta]] takes over Talon, she imprisons Sigma after deciding he is too dangerous.{{cite web |first=Kenneth |last=Shepard |accessdate=2026-02-11 |date=2026-02-11 |title=Overwatch Is Roaring Back On Steam After Massive Season 1 Patch |website=[[Kotaku]] |url=https://kotaku.com/overwatch-new-heroes-story-sigma-dialogue-sombra-talon-2000667771}}

When asked if the character's mental health was the focus of his story, lead writer Michael Chu stated this is that not the case, and that Sigma was instead focused on the accident that left him "eccentric". Chu elaborated by stating that as a result of it he views the world differently, seeing everything through a "prism of music", inspired by their discussions with real-life scientists and physicists. Despite working for Talon, Sigma is kept separated from the decision-making part of the group, with Chu likening his situation to a "[[Boiling frog|frog being boiled]]". With ''Overwatch 2'', after the character [[Vendetta (Overwatch)|Vendetta]] takes over Talon, she imprisons Sigma after deciding he is too dangerous.{{cite web |first=Kenneth |last=Shepard |accessdate=2026-02-11 |date=2026-02-11 |title=Overwatch Is Roaring Back On Steam After Massive Season 1 Patch |website=[[Kotaku]] |url=https://kotaku.com/overwatch-new-heroes-story-sigma-dialogue-sombra-talon-2000667771}}

===Gameplay===

===Gameplay===

In ''Overwatch'', Sigma is classified as a [[Characters of the Overwatch franchise#Tank heroes|Tank-class]] character, designed to absorb large amounts of damage from the enemy team in team compositions while protecting their teammates. His main weapons are "Hyperspheres", gravitic projectiles that can bounce off walls and damage a small area that draws foes into the explosion. The weapon was conceived to help differentiate him from another character in the game, [[Zarya (Overwatch)|Zarya]], who also utilizes a gravity-related attack. Doing so allowed Zarya to retain her theme of physical strength, while Sigma's weapon helped reinforce his role as a scientist. In additional to his weapon, Sigma can generate energy shields with his "Experimental Barrier" ability, and can adjust the position of the shield before use.{{cite web |website=TechRadar |date=2023-04-25 |title=Overwatch 2 Sigma guide: lore, abilities, and gameplay |first=Elie |last=Gould |accessdate=2025-03-09 |url=https://www.techradar.com/how-to/overwatch-2-sigma-guide-lore-abilities-and-gameplay}}

In ''Overwatch'', Sigma is classified as a [[Characters of the Overwatch franchise#Tank heroes|Tank-class]] character, designed to absorb large amounts of damage from the enemy team while protecting their teammates. His main weapons are "Hyperspheres", gravitic projectiles that can bounce off walls and damage a small area that draws foes into the explosion. The weapon was conceived to help differentiate him from another character in the game, [[Zarya (Overwatch)|Zarya]], who also utilizes a gravity-related attack. Doing so allowed Zarya to retain her theme of physical strength, while Sigma's weapon helped reinforce his role as a scientist. In additional to this weapon, Sigma can generate energy shields with his "Experimental Barrier" ability, and can adjust the position of the shield before use.{{cite web |website=TechRadar |date=2023-04-25 |title=Overwatch 2 Sigma guide: lore, abilities, and gameplay |first=Elie |last=Gould |accessdate=2025-03-09 |url=https://www.techradar.com/how-to/overwatch-2-sigma-guide-lore-abilities-and-gameplay}}

Sigma also has several abilities that require activation, though have a "cooldown" period after use, and are unable to be used again during that duration. "Kinetic Grasp" allows him to absorb projectiles in front of him, turning some of the intended damage into temporary health, though it cannot absorb damage from melee-based attacks. "Accretion" meanwhile generates a large projectile of rock, that once launched can knock down opponents, temporarily stunning them. Lastly his 'ultimate' ability, called "Gravitic Flux", requires to charging before use. The ability charges slowly during the course of gameplay, and can be charged faster through damage dealt to the enemy team. Once the ability meter is full, the ability can be activated to lift enemies into the air before slamming them down, dealing significant damage to them.

Sigma also has several abilities that require activation, though have a "cooldown" period after use, and are unable to be used again during that duration. "Kinetic Grasp" allows him to absorb projectiles in front of him, turning some of the intended damage into temporary health, though it cannot absorb damage from melee-based attacks. "Accretion" meanwhile generates a large projectile of rock, that once launched can knock down opponents, temporarily stunning them. Lastly his 'ultimate' ability, called "Gravitic Flux", requires to charging before use. The ability charges slowly during the course of gameplay, and can be charged faster through damage dealt to the enemy team. Once the ability meter is full, the ability can be activated to lift enemies into the air before slamming them down, dealing significant damage to them.