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Unable to move, block, attack, or use skills.
—In-game tip

Stun is an Abnormal Status in Arknights.

Effect

A stunned unit is indicated by a "dizzy" effect above them, with Operators and certain enemies (notably Mephisto and W) having a special animation used when they are stunned. In this state, the unit will become unable to perform any actions, be it attacking, moving, or using skills. Friendly units that are stunned may still be retreated.

One should watch out if a friendly unit is stunned, as they will become unable to block enemies. This can be dangerous if the said friendly are frontline Operators, as this will allow enemies to move past them.

Sources

Against enemies

Operators

Operator Source Range/Target Duration
Drug Cocktail Administration (talent) Attack (randomly) 0.6 ~ 1 second(s)
Precise Strike (talent) Attack (with a 25% (+3%) chance, only against enemies outside the normal attack range) 2 seconds
Auxiliary Equipment (talent) Within attack range, AoE 3/4 seconds
Skill-Beeswax2.png
Guardian Obelisk
Sand Obelisk deployment
  
  
  
  • L1-L6: 1 second
  • L7: 1.5 seconds
  • M1: 2 seconds
  • M2: 2.5 seconds
  • M3: 3 seconds
Skill-Bibeak2.png
Blade Swap
Up to 5 enemies
    
  
    
  • L1-L3: 0.8 seconds
  • L4-L6: 1 second
  • L7: 1.2 seconds
  • M1: 1.4 seconds
  • M2: 1.6 seconds
  • M3: 1.8 seconds
Skill-Blitz1.png
Flash Shield
   
  
   
  • L1-L3: 2.5 seconds
  • L4-L6: 3 seconds
  • L7: 3.5 seconds
  • M1: 3.8 seconds
  • M2: 4.1 seconds
  • M3: 4.5 seconds
Skill-Blitz2.png
Shield Bash
Blocked enemies
  • L1-L6: 5 seconds
  • L7-M2: 6 seconds
  • M3: 7 seconds
Skill-Ch'en1.png
Sheathed Strike
Attack (when charged)
  • L1-L3: 1 second
  • L4-L6: 1.25 seconds
  • L7-M3: 1.5 seconds
Skill-Ch'en3.png
Chi Xiao - Shadowless
Last hit
    
  
  
    
  • L1-L3: 2 seconds
  • L4-L6: 2.5 seconds
  • L7-M2: 3 seconds
  • M3: 4 seconds
Skill-Click1.png
Synchronized Attack
Attack, both Click herself and her Drone (with a 20% ~ 27% chance while active)
  
  
  
  • L1-L6: 0.4 seconds
  • L7-M2: 0.7 seconds
  • M3: 1 second
Skill-Cliffheart2.png
Binding Chains
Up to 2/3 enemies
   
  
   
  • L1-L7: 1.5 seconds
  • M1: 2 seconds
  • M2: 2.5 seconds
  • M3: 3 seconds
Skill-Croissant2.png
Magnetic Hammer
    
  
    
  • L1-L3: 2.5 seconds
  • L4-L6: 3 seconds
  • L7-M2: 3.5 seconds
  • M3: 4 seconds
Skill-Eunectes2.png
Menacing Slash
Blocked enemy Menacing Slash's remaining duration
Skill-Flametail2.png
"Pinus Sylvestris"
Applied twice
    
  
  
    
0.5 seconds
Skill-Frost1.png
Trap Deployment
Welcome Mat trigger
  • L1-L7: 1 second
  • M1-M2: 1.2 seconds
  • M3: 1.5 seconds
Skill-Glaucus2.png
Counter EMP
Only works on drones
      
    
  
  
    
      
  • L1-L3: 3.5 seconds
  • L4-L6: 4 second
  • L7: 4.5 seconds
  • M1: 5 seconds
  • M2: 5.5 seconds
  • M3: 6 seconds
Frying Pan Specialist (talent) Attack (with a 10%/15% chance) 0.5/1 second(s)
Non-Damaging Restructuring (talent) When Mon3tr is knocked out (not retreated)
  
  
  
3 (+0.5) seconds
Skill-Liskarm2.png
Counter Arc
Attack (with a 10% ~ 25% chance while active) to up to 3/4 enemies 1 second
Skill-Manticore2.png
Toxic Overload
Attack (while active)
  • L1-L3: 0.5 seconds
  • L4-L6: 0.6 seconds
  • L7: 0.7 seconds
  • M1: 0.8 seconds
  • M2: 0.9 seconds
  • M3: 1 second
Skill-May2.png
Binding Shock
Attack (with a 30% chance while active)
  • L1-L3: 0.9 seconds
  • L4-L7: 1 second
  • M1-M2: 1.1 seconds
  • M3: 1.2 seconds
Skill-Mizuki3.png
Moon in the Water
Attack (while active)
  
 
 
  
  • L1-L3: 0.5 seconds
  • L4-M6: 0.7 seconds
  • L7-M3: 1 second
Skill-Mostima2.png
Lock of Shattered Time
All enemies within attack range
  • L1-L3: 4 seconds
  • L4-L6: 5 seconds
  • L7-M2: 6 seconds
  • M3: 7 seconds
Unexpected Strike (talent) Attack (after not attacking for 4 seconds) 3/4 seconds
Skill-Mudrock2.png
Crag Splitter
Attack (with a 30% chance when charged)
  
  
  
  • L1-L3: 0.4 seconds
  • L4-L6: 0.5 seconds
  • L7: 0.6 seconds
  • M1: 0.8 seconds
  • M2: 1 second
  • M3: 1.2 seconds
Skill-Mudrock3.png
Bloodline of Desecrated Earth
    
  
  
    
After the first phase ends
  • L1-L6: 3 seconds
  • L7: 3.5 seconds
  • M1: 4 seconds
  • M2: 4.5 seconds
  • M3: 5 seconds
Skill-Nearlight3.png
Blazing Sun's Obeisance
Blazing Sun deployment
    
  
    
3 seconds
Brave the Darkness (talent) When deployed
    
  
    
  • E1: 2 seconds
  • E2: 3 seconds
Skill-Phantom3.png
Night Raid
  
  
  
  • L1-L3: 2 seconds
  • L4-L6: 2.5 seconds
  • L7: 3 seconds
  • M1: 3.5 seconds
  • M2: 4 seconds
  • M3: 4.5 seconds
Skill-Rosmontis2.png
Nociceptor Inhibition
Attack (with a 20% chance while active)
  • L1-L3: 0.7 seconds
  • L4-L6: 0.9 seconds
  • L7: 1.1 seconds
  • M1: 1.2 seconds
  • M2: 1.3 seconds
  • M3: 1.5 seconds
Skill-Rosmontis3.png
"As You Wish"
Tactical Equipment deployment
  
  
  
  • L1-L3: 1.5 seconds
  • L4-L6: 2 seconds
  • L7-M2: 2.5 seconds
  • M3: 3 seconds
Skill-Siege2.png
Skull Breaker
Attack (with a 40% chance while active)
  • L1-L3: 0.5 seconds
  • L4-L6: 0.8 seconds
  • L7: 1.1 seconds
  • M1: 1.2 seconds
  • M2: 1.3 seconds
  • M3: 1.5 seconds
Skill-Skyfire1.png
Fire of Heaven
Attack (while active)
  • L1-L3: 0.1 seconds
  • L4-L6: 0.15 seconds
  • L7: 0.2 seconds
  • M1: 0.4 seconds
  • M2: 0.6 seconds
  • M3: 1 second
Skill-Texas1.png
Sword Rain
Applied twice
    
  
  
    
  • L1-L7: 2 seconds
  • M1-M3: 3 seconds
Skill-Tomimi2.png
Gavial's Protection Plan
Attack (randomly, with a 50% ~ 100% chance while active)
     
    
     
  • L1-L3: 0.6 seconds
  • L4-L6: 0.8 seconds
  • L7-M2: 1.2 seconds
  • M3: 1.6 seconds
Skill-W1.png
King of Heart
Within attack range, AoE
  • L1-L3: 1.5 seconds
  • L4-L6: 1.8 seconds
  • L7: 2.1 seconds
  • M1: 2.4 seconds
  • M2: 2.7 seconds
  • M3: 3 seconds
Skill-W2.png
Jack in the Box
Front Toward Enemy detonation
  • L1-L3: 1.4 seconds
  • L4-L6: 1.6 seconds
  • L7-M1: 1.8 seconds
  • M2: 2 seconds
  • M3: 2.2 seconds
Skill-W3.png
D12
Up to 3/4 enemies within attack range, AoE
  • L1-L3: 3 seconds
  • L4-L6: 3.5 seconds
  • L7-M1: 4 seconds
  • M2: 4.5 seconds
  • M3: 5 seconds
Skill-Weedy1.png
Barrel Burst
Attack (when charged)
  • L1-L6: 0.8 seconds
  • L7: 0.9 seconds
  • M1: 1 second
  • M2: 1.1 seconds
  • M3: 1.2 seconds

Objects

Against friendlies

Operators

Operator Source Range/Target Duration
Skill-Amiya1.png
Spirit Burst
Self 10 seconds after Spirit Burst expires
Skill-Broca2.png
High-Voltage Current
After High-Voltage Current expires
  • L1-L3: 8 seconds
  • L4-L6: 7 seconds
  • L7-M2: 6 seconds
  • M3: 5 seconds
Skill-Conviction2.png
Genesis
Only if Genesis fails (50% chance, all friendlies within range)
    
  
  
    
5 seconds
Safe Landing (talent) Self 10 seconds after deployment
Skill-Corroserum1.png
Focus Overload
10 seconds after Focus Overload expires
Skill-Eunectes3.png
Iron Will
5 seconds after Iron Will expires
Skill-Gitano1.png
Destiny
After Destiny expires
  • L1-L3: 15 seconds
  • L4-L6: 14 seconds
  • L7: 13 seconds
  • M1: 12 seconds
  • M2: 11 seconds
  • M3: 10 seconds
Skill-Liskarm2.png
Counter Arc
5 seconds after Counter Arc expires
Skill-Scene2.png
Panoramic Overload
All deployed Buggy Cams 5 seconds after Panoramic Overload expires
Skill-Specter1.png
Bone Fracture
Self 10 seconds after Bone Fracture expires

Enemies

Enemy Method Duration
Every three attacks 7 seconds
Every four attacks
Every three attacks 5 seconds
15 seconds
Death explosion (AoE, 3 tiles)
  • 16 seconds (Level 0)
  • 25 seconds (Level 1)
Boulder attack (range 2.5 tiles, 13 seconds cooldown) 25 seconds
Every four attacks (up to 2 targets) 3 seconds
Exsanguination (global range, 10/15 seconds cooldown) 10 seconds
  • The Lost Colossus will never use the boulder attack against stunned friendly units.

Other

Interactions

Operator Skill/Talent Notes
Skill-Ash2.png
Assault Tactics
Ash's attacks while Assault Tactics is active deals 150% ~ 250% damage against stunned enemies.
Shielded Shooting (talent) Blitz attacks stunned enemies over the others and his ATK is increased to 130% ~ 160% (+5%) against stunned enemies, which is multiplied by 1.2× ~ 1.5× while Skill-Blitz2.png Shield Bash is active.
Insult to Injury (talent) Stunned enemies within W's attack range takes +18% (+3%) Physical damage.

Trivia

  • There are actually two flags in the game for the Stun status effect. The one in use in majority is the traditional "STUNNED" flag. There exists, however, an unused "STUNNED_NO_AMPLIFY_DAMAGE" flag which has the effect of traditional stun but does not apply the aforementioned damage amplifications in the Interactions section.
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