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Corruption cards is a part of "roguelike" card system featured in Back 4 Blood.

The Director draws unique cards at the outset of every single level. Corruption cards apply various randomized game parameters related to the Ridden, the weather, etc, and these cards stack additional dangers with every passing chapter. These cards are said to offer the player replayability.

After the Director picks their cards, players will draw cards and can pick one or multiple of them.

List of corruption cards

Common Ridden

To simplify the overview, variants of cards have been excluded from this list.

Card Art Title Description
CorruptionCard BlankArt Armored Joggers.png Armored Joggers SWAT armor was meant to protect against bullets, not devil worms. These Ridden are going to be harder to take down.
CorruptionCard BlankArt Armored Runners.png Armored Runners SWAT armor was meant to protect against bullets, not devil worms. These Ridden are going to be harder to take down.
CorruptionCard BlankArt Armored Sprinters.png Armored Sprinters SWAT armor was meant to protect against bullets, not devil worms. These Ridden are going to be harder to take down.
CorruptionCard BlankArt Armored Walker 001.png Armored Walkers SWAT armor was meant to protect against bullets, not devil worms. These Ridden are going to be harder to take down.
CorruptionCard BlankArt Blighted Ridden.png Blighted Ridden A Mutation has turned the Ridden blood into acid, they leave behind pools of caustic acid on death.
CorruptionCard BlankArt Blitzing 001.png Blitzing This is what remains of the living. Aim for the head to put them down quickly.
CorruptionCard BlankArt Charred Ridden.png Charred Ridden These burning Ridden ignore the flames entirely. Keep your distance or burn alive
CorruptionCard BlankArt Festering Ridden.png Festering Ridden Festering Common attacks cause a stacking loss of Stamina and Healing Efficiency.
Medkits, First Aid Cabinets, and Doc's healing ability can remove the effects.
CorruptionCard BlankArt Jogging Ridden 001.png Jogging Ridden This is what remains of the living. Aim for the head to put them down quickly.
CorruptionCard BlankArt Running Ridden 001.png Running Ridden This is what remains of the living. Aim for the head to put them down quickly.
CorruptionCard BlankArt Shambling Ridden 001.png Shambling Ridden What remains of the Living, aim for the head to put them down quickly.
CorruptionCard BlankArt Sprinting Ridden 001.png Sprinting Ridden This is what remains of the living. Aim for the head to put them down quickly.
CorruptionCard BlankArt Volatile Ridden.png Volatile Ridden These Ridden have developed an Unstable Cyst on their Skull Cavity. Head Trauma will cause them to Explode Violently.

Mutations

Corruption cards for Mutations will determine the most common types of Mutations to appear on the current level. However, it is possible for any mutation to appear. Both Mutations and bosses can come in a variety of variations which also give the Mutations (not bosses) new abilities to help take out the cleaner team. Monstrous mutations contain their ferocious abilities in addition to their monstrous ability with the exception of the Ripper which; replaces its Ferocious skill with the monstrous one. In addition they may also be armored.

Ferocious Mutations and bosses have 25% more health and deal 50% more damage.

Monstrous Mutations and bosses have 50% more health and deal 100% more damage.

Card Art Title Description Variants (and additional objectives)
CorruptionCard BlankArt Armored Bruiser 001.png Armored Bruiser Bruisers can take a lot of punishment. Keep moving and don't let them get close. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Crusher 001.png Armored Crusher Getting crushed is the worst way to die. Attack the Crusher to free your teammates. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Exploder 001.png Armored Exploder Stay away from these two-legged death bombs. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Hocker 001.png Armored Hocker Melee teammates to free them from Hocker pins. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Retch 001.png Armored Retch Acidic spew leaves dangerous bile pools. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Ripper001.png Armored Ripper This Warped Ridden flings spiked cysts in a line from his massive arm to attack from afar. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Shredder001.png Armored Shredder This subterranean Warped Ridden launches adhesive tendrils that pull Cleaners toward it, applying the Pus Covered status. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Stalker 001.png Armored Stalker A grabbed teammate is a dead teammate. Quickly kill the Stalker to free teammates. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Stinger 001.png Armored Stinger Stinger spit toxic spittle from long distances or high vantage points. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Tallboy 001.png Armored Tallboy These towering mutations can surge into powerful slam attacks. Aim for the weakspot or use fire to take them out. Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Armored Urchin001.png Armored Urchin This subterranean Warped Ridden hurls Urchin Mines that damage and slow Cleaners. Damage the Mines to clear them! Armored Mutations can also be Ferocious or Monstrous.


Armored:

Weakspots are covered by durable Armor.

CorruptionCard BlankArt Boss Mutation 001.png Boss Mutation Beware, a dangerous Boss Mutation lurks nearby. Boss Mutation can also be Ferocious or Monstrous.


No Hope Specific card, See challenges and rewards for the Challenge Variant.

CorruptionCard BlankArt Bruiser 001.png Bruiser Bruisers can take a lot of punishment. Keep moving and don't let them get close. Tenacious (Ferocious):

Bruiser's regenerate while in a Frenzy.


Fearsome (Monstrous):

Bruisers reduce the damage of nearby Cleaners.

CorruptionCard BlankArt Crusher 001.png Crusher Getting crushed is the worst way to die. Attack the Crusher to free your teammates. Traumatic (Ferocious):

Crushers deal 100% Trauma damage.


Stubborn (Monstrous):

Crushers no longer release a grabbed Cleaner from bullet stumble.

CorruptionCard BlankArt Exploder 001.png Exploder Stay away from these two-legged death bombs. Shockwave (Ferocious):

Explosion knockback increased by 100%


Concussive (Monstrous):

Cleaners hit by explosion are briefly blinded.

CorruptionCard BlankArt Hag 001.png Hag A Hag is stalking you. Ferocious and Monstrous Variants also have their weakspots covered with armor.
CorruptionCard BlankArt Hocker 001.png Hocker Melee teammates to free them from Hocker pins. Heartpiercer (Ferocious):

Hocker Pin deals an additional 10 damage on impact.


Toxin (Monstrous):

Hocker Pin leaves a toxin that reduces healing recieved by 50% for 30 seconds.

CorruptionCard BlankArt Ogre 001.png Ogre You've drawn the attention of the Ogre. Ferocious and Monstrous Variants also have their weakspots covered with armor.
CorruptionCard BlankArt Reeker 001.png Reeker Reeker guts can call the horde if they explode on you. Viscous (Ferocious):

Cleaners hit by Reeker explosions are slower by an additional 30%.


Irritant (Monstrous):

Cleaners hit by Reeker explosions also take 25% increased damage for 1 minute.

CorruptionCard BlankArt Retch 001.png Retch Acidic spew leaves dangerous bile pools. Gunk (Ferocious):

Direct hits with vomit also reduce Reload, Swap, and Use speed by 35%.


Adhesive (Monstrous):

Acid pools also reduce move speed by 75%.

CorruptionCard BlankArt Ripper001.png Ripper This Warped Ridden flings spiked cysts in a line from his massive arm to attack from afar. Destruction (Ferocious):

Hurls spiked balls in 3 wide lines. Find the gap between lines.


Annihilation (Monstrous):

Spiked Balls are flung in a solid arc in front of the Ripper.

CorruptionCard BlankArt Shredder001.png Shredder This subterranean Warped Ridden launches adhesive tendrils that pull Cleaners toward it, applying the Pus Covered status. Viscous (Ferocious):

Cleaners hit by Shredder Implosions are slower by 30%.


Impact (Monstrous):

Cleaners hit by Shredder Implosions will take damage.

CorruptionCard BlankArt Stalker 001.png Stalker A grabbed teammate is a dead teammate. Quickly kill the Stalker to free teammates. Blooddrinker (Ferocious):

Stalkers heal whenever they deal damage.


Meat Shield (Monstrous):

Stalkers take less damage while grabbing a Cleaner.

CorruptionCard BlankArt Stinger 001.png Stinger Stinger spit toxic spittle from long distances or high vantage points. Congeal (Ferocious):

Stinger Spittle blinds and has an increased slowing effect


Predator (Monstrous):

Stingers attack 50% faster.

CorruptionCard BlankArt Tallboy 001.png Tallboy These towering mutations can surge into powerful slam attacks. Aim for the weakspot or use fire to take them out. Hardened (Ferocious):

Tallboys take 75% reduced damage from Explosions


Quick (Monstrous):

Tallboys attack 50% faster

CorruptionCard BlankArt Urchin001.png Urchin This subterranean Warped Ridden hurls Urchin Mines that damage and slow Cleaners. Damage the Mines to clear them! Paralytic (Ferocious):

Cleaners hit by the Urchin Mine are slowed even further


Secretion (Monstrous):

The Urchin Mine's acidic goo radius is increased

Challenge & Rewards

Card Art Title Description Variants (Additional Objectives)
CorruptionCard BlankArt Boss Mutation 001.png Boss Mutation Defeat the Boss and complete the level to earn 500 Copper. Cards may offer 500 Copper and Bonus Supply Points.


Cards may also come in Ferocious or Monstrous forms.


Variant 1 (nameless): Reach the end with all 4 Cleaner's alive

Variant 2 (nameless): Reach the end without any Cleaner's being incapacitated

CorruptionCard BlankArt Blood Samples.png Blood Samples Find and bring the Specimen Container to the end of the level to earn 500 Copper. Cards may offer 500 Copper and Bonus Supply Points.


Blood Samples - Survival: Reach the end with all 4 Cleaner's alive

Blood Samples - Elite: Reach the end without any Cleaner's being incapacitated

CorruptionCard BlankArt No One Left Behind.png No One Left Behind Complete the level with all four Cleaners alive to earn 500 Copper. Card may offer 500 Copper and Bonus Supply Points.
CorruptionCard BlankArt Safety First.png Safety First Complete the level without the cleaners being incapacitated more than 4 times to earn 500 Copper. Cards may offer 500 Copper and Bonus Supply Points.


Safety First - Expert: without cleaners being incapacitated more than 3 times.

Safety First - Elite: without cleaners being incapacitated more than 2 times.

Safety First - Veteran: without cleaners being incapacitated more than once.

Safety First - Flawless: without cleaners being incapacitated.

CorruptionCard BlankArt Silence Is Golden.png Silence Is Golden Complete the level without triggering any birds, Snitches, Car Alarms or Alarmed doors to earn 500 Copper. Cards may offer 500 Copper and Bonus Supply Points.


Silence is Golden - Survival: with all cleaners alive

CorruptionCard BlankArt Skull Totems.png Skull Totems Find Skull Totems Skull Totems and cash them in at any exit.

Events

Card Art Title Description
CorruptionCard BlankArt Biohazard.png Biohazard Ridden deal 25% extra damage.
3 Temporary Health granted by kills.
100% Team Bolstered Health.
Temporary Health decay rate increased by 200%.
CorruptionCard BlankArt Cave In.png Cave In Rocks line the ceiling. Watch out when the ground starts shaking!
CorruptionCard BlankArt Cost of Avarice.png Cost of Avarice For every 100 Copper you carry, Move Speed, Sprint Speed, Sprint Efficiency are reduced by 2% and Damage Resistance is reduced by 3.5% (to a maximum of 30 stacks).
CorruptionCard BlankArt Gloom.png Gloom Power is out in most of the area. Only emergency door alarms remain active.
CorruptionCard BlankArt Hunted.png Hunted There are rampaging hordes in this area. It's only a matter of time before they find us. (Horde Spawns every 3 minutes)
CorruptionCard BlankArt Mist.png Mist An Unnatural fog has settled on this area.
CorruptionCard BlankArt Noxious Fumes.png Noxious Fumes Noxious gas fills the air. Fill up on oxygen at generators found throughout the map before moving forward. Breathing the fumes without oxygen will have increasing negative effects.
CorruptionCard BlankArt Onslaught.png Onslaught The horde is right on our heels, move fast or be overrun.
CorruptionCard BlankArt Pure Chaos.png Pure Chaos Timed Hordes
Healing Efficiency reduced by 50%
Large quantities of Frags or Molotovs appear in the map
CorruptionCard BlankArt Reeker Hordes.png Reeker Hordes Huge hordes of Reekers, Retches, and Exploders will attack on a timer.
CorruptionCard BlankArt Slumber Party.png Slumber Party The area is infested with Sleepers, stay together and keep your eyes open.
CorruptionCard BlankArt Stinger Hordes.png Stinger Hordes Huge hordes of Stingers, Stalkers, and Hockers will attack on a timer.
CorruptionCard BlankArt Tallboy Hordes.png Tallboy Hordes Huge hordes of Tallboys, Crushers, and Bruisers will attack on a timer.
CorruptionCard BlankArt Tattlers.png Tattlers The mindless babbling of Snitches can be heard constantly here. Work together to avoid notice.
CorruptionCard BlankArt The Birds.png The Birds Large flocks of crows have gathered in this area to feast on the dead. Startling them could call the horde down on you.
CorruptionCard BlankArt The Dark.png The Dark The Power is out and a new Snitch mutation has emerged that will instantly call a horde when alerted. Stay quiet and you may make it through.
CorruptionCard BlankArt The Fog.png The Fog Beware of what awaits you in The Fog.
CorruptionCard BlankArt The Lockdown.png The Lockdown Entering a High Security Area. Many of the Alarmed doors are still intact. Proceed with Caution.
CorruptionCard BlankArt Reeker Hordes.png Timed Reeker Horde Reekers horde this area.
CorruptionCard BlankArt Stinger Hordes.png Timed Stinger Horde Packs of Stingers hunt the players.
CorruptionCard BlankArt Tallboy Hordes.png Timed Tallboy Horde Tallboys appear sooner, and in greater numbers.
CorruptionCard BlankArt Toxic Spill.png Toxic Spill Your health slowly rots away, but kills grant a small reprieve.

Finales

Card Art Title Description
CorruptionCard BlankArt Finale The Devil's Return.png The Devil's Return Escape across the Evansburgh Bridge toward Finleyville with a horde on your heels.
CorruptionCard BlankArt Finale Search and Rescue.png Search and Rescue Create a distraction in the Bar so the survivors can escape to Fort Hope.
CorruptionCard BlankArt Finale The Dark Before The Dawn.png The Dark Before The Dawn Reestablish supply lines to the Diner.
CorruptionCard BlankArt Finale Blue Dog Hollow.png Blue Dog Hollow Collapse the mine to cutoff the source of the Ridden.
CorruptionCard BlankArt Finale The Armory.png The Armory Gain access to the armory in the Police Station. The hordes are increasingly aggressive here.
CorruptionCard BlankArt Finale Plan B.png Plan B Secure the weapons cache and send it back to Fort Hope.
CorruptionCard BlankArt Finale Job 10 22.png Job 10:22 Meet with Phillips' operative at the Church. Stay alert, there's a new Snitch mutation in the area that will always call the horde when alerted or killed.
CorruptionCard BlankArt Finale Dr. Rogers' Neighbourhood.png Dr. Rogers' Neighbourhood Hold back the horde to buy time to secure Roger's Research.
CorruptionCard BlankArt Finale Remnants.png Remnants Take the weapon to the heart of the Ridden Infestation.
CorruptionCard BlankArt Finale The Abomination.png The Abomination Defeat the Ridden Abomination to save Fort Hope.

Warped Chests

Card Art Title Description
CorruptionCard BlankArt Chronic Injuries.png Chronic Injuries Trauma Resistance is reduced by 20%
Damage Resistance is reduced by 5%
CorruptionCard BlankArt Deep Wounds.png Deep Wounds Instantly receive Trauma Damage
CorruptionCard BlankArt Sluggish.png Sluggish Max Stamina is reduced by 20%
Stamina Regeneration is reduced by 20%
Move Speed is reduced by 5%
CorruptionCard BlankArt Sticky.png Sticky Reload Speed is reduced by 20%
Weapon Swap Speed is reduced by 20%

Removed Cards

In April's Patch (V.1.000.007) Timed objectives were removed. This includes bonus objective requirements on challenges such as Blood Samples, Boss Mutation and Safety First; and also the following speed specific cards:

Card Art Title Description
CorruptionCard BlankArt Cut The Red Wire.png Cut The Red Wire Complete the level within the time limit without triggering any birds, Snitches, Car Alarms, or Alarmed doors to earn 500 Copper.
CorruptionCard BlankArt Hasty Exit.png Hasty Exit Complete the level within the time limit with all cleaners alive to earn: +500 Copper, +Bonus Supply Points
CorruptionCard BlankArt Speed Run.png Speed Run Complete the level within the time limit to earn 500 Copper.
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