Weekly Outbreaks

Weekly Outbreaks in Killing Floor 2 are the special variations of normal survival mode with the specific mutator-a-like twists that modify certain gameplay elements making the game more challenging or forcing players to pickup specific strategies and loadouts in order to survive. There are currently 8 possible Outbreaks, with one available each week. It changes over on tuesday evenings (US time). Completing a Weekly Outbreak will earn players cosmetic rewards and 500,000 Vosh (cosmetic in-game currency) which is enough to acquire one Vault Crate that contains player accessories and weapon skins to customize your character.

Weekly Outbreaks were added in the game on June 13, 2017, as a part of the Summer Sideshow update.

Boom

Killing Floor 2 horzine weekly outbreak
Boom
Zeds under pressure; may explode.
Maybe it was something they ate? Bad gas? Whatever it was, Zeds explode when killed in this outbreak.
Start Date
End Date
		Killing Floor 2 Weekly Outbreaks - Boom
Outbreak Completion Reward
	Weekly | Mind Blown
Related Achievements

Zeds under pressure; may explode.

Gameplay specifics

• Explosive ZEDs: ZEDs explode on death.
• Difficulty - Hard, Waves - 7.
• Explosion: Damage - 35, Radius - 4.5m, Falloff exponent - 2, Damage type - Explosive.
• Explosion (Bloat, Scrake, Fleshpound, bosses): Damage - 35, Radius - 5.5m, Falloff exponent - 2, Damage type - Explosive.
• ZEDs do not take any damage from the explosions.
• Fleshpounds spawn already enraged.

Cranium Cracker

Killing Floor 2 horzine weekly outbreak
Cranium Cracker
Brain damage is the best damage.
In this outbreak, the Zeds have mutated such that they can only be put down for good with damage to the head.
Start Date
End Date
		Killing Floor 2 Weekly Outbreaks - The Cranium Cracker
Outbreak Completion Reward
	Centerfire | Headshot Weekly | Mint
Related Achievements

Brain damage is the best damage.

Gameplay specifics

• Headshots only: ZEDs only take damage when being hit in the head.
• Difficulty - Hard, Waves - 7.
• Quarter Pound health scale - x0.9.
• Hans Volter health scale - x0.25, shield scale - x1.
• Patriarch health scale - x0.25.
• King Fleshpound health scale - x0.75, shield scale - x0.5.
• Note that shield HP also depends on the actual health scale.

Tiny Terror

Killing Floor 2 horzine weekly outbreak
Tiny Terror
A small threat is still a threat.
Shooting Zeds in this outbreak will cause them to shrink, making them harder to hit.
Start Date
End Date
		Killing Floor 2 Weekly Outbreaks - Tiny Terror
Outbreak Completion Reward
	Weekly | Tiny Terror Hat | Precious
Related Achievements

A small threat is still a threat.

Gameplay specifics

• Shrinking ZEDs / players: ZEDs and players have their size scaled based on their health percentage.
• Difficulty - Suicidal, Waves - 7.
• Size scale at 100% HP - x1, Size scale at 0% HP - x0.5.

Bobble Zed

Killing Floor 2 horzine weekly outbreak
Bobble Zed
...that must hurt their necks.
Something went horribly wrong with this batch of Zeds and their heads are wwwaaaayyyyyyy larger than normal! Huge even!
Start Date
End Date
		Killing Floor 2 Weekly Outbreaks - Bobble Zed
Outbreak Completion Reward
	Weekly | Horzine Helmet | Precious
Related Achievements

...that must hurt their necks.

Gameplay specifics

• Enlarged head size: ZEDs and players have bigger heads. ZEDs have more health and only die when their body health is depleted.
• Difficulty - Suicidal, Waves - 7.
• ZEDs head size scale - x2.7, Players head size scale - x2.
• No head dismemberment allowed. ZEDs cannot be killed by taking off their head health.
• It should be noted that ZEDs still take extra damage to body health upon draining head HP (see step 7 of Damage To Take mechanics).
• ZEDs spawn much faster (x2.5 spawn rate multiplier).
• Each wave contains only 70% of the base wave AI amount.
• All ammo has 50% discount.

ZEDs have their health and headhealth adjusted by following multipliers:
ZED:	Health scale:		Head health scale:
Abomination	x1.5		---
Alpha	x3		x4.5
AlphaKing	x3		x3
Bloat	x1.5		x1.5
Crawler	x3		x5
CrawlerKing	x3		x5
Cyst	x3		x4.5
Fleshpound	x2		x1.5
Gorefast	x3		x2
Gorefiend	x3		x2
Hans	x1		---
Husk	x2		x2.5
King FP	x2		---
Patriarch	x1		---
Quarter FP	x1.5		x1.1
Scrake	x3		x3
Siren	x3		x3
Slasher	x3		x4.5
Stalker	x3		x2.5

Poundemonium

Killing Floor 2 horzine weekly outbreak
Poundemonium
All Fleshpounds, all the time. Almost.
The Fleshpound Convention is in town!
Start Date
End Date
		Killing Floor 2 Weekly Outbreaks - Poundemonium
Outbreak Completion Reward
	Weekly | King Pound Visor | Precious
Related Achievements

All Fleshpounds, all the time. Almost.

Gameplay specifics

• Boss replacement: Fight against King Fleshpound. King Fleshpound is capable of performing special "Whirlwind", "Ground Pound Explosion" and "Chest Beam" attacks. When King Fleshpound changes its battle phase it spawns a set of mini Fleshpounds (Quarter Pounds). Quarter Pounds also have a chance to replace common ZEDs.
• Difficulty - Suicidal, Waves - 7.
• Each time King Fleshpound changes its battle phase (including phase 0, when it appears on the map) it spawns a set of Quarter Pounds, which are the smaller versions of the normal Fleshpound. Quarter Pounds have less health and are slightly more vulnerable against various damage types than normal Fleshpounds. The amount Quarter Pounds spawned depends on the number of players on the server (1-6).
• ZED to be replaced by Quarter Pound - Odds: AlphaClot - 5%, Slasher - 10%, GoreFast - 10%, Crawler - 5%, Stalker - 5%, Bloat - 65%.
• Scrake has 90% chance to be replaced by Fleshpound (normal variant).
• Each wave contains only 55% of the base wave AI amount.
• King Fleshpound always spawns enraged.

Up, Up, and Decay

Killing Floor 2 horzine weekly outbreak
Up, Up, and Decay
Try to make ninety-nine Zed balloons.
Shooting Zeds in this outbreak will cause them to inflate like balloons, even to the point of floating away and popping!
Start Date
End Date
		Killing Floor 2 Weekly Outbreaks - Up, Up and Decay
Outbreak Completion Reward
	Weekly | Hans Plushy Backpack
Related Achievements

Try to make ninety-nine Zed balloons.

Gameplay specifics

• ZEDs regenerate HP: ZEDs enlarge upon taking damage and at the same time constantly regenerate their health / deflate. Killed ZEDs have custom gravity scale and also explode shortly, acting like balloons.
• Note: In this mode ZEDs do not die to headshots: regardless of where the shot lands ZED takes health and headhealth damage at the SAME TIME. Damage dealt to headhealth is a % of how much damage ZED took compare to its maximum body health. For example: Slasher (200 health, 50 headhealth) vs. off-perk SCAR-H (55 points of damage):

1. Slasher gets hit in body once, its health become 145 and its headhealth at the same time become (145 / 200) x 50 = 36.
2. Slasher gets hit in head once. Since the incoming damage is greater than Slasher's headhealth, the Extra Damage On Decapitation mechanic kicks in (see "ZEDs - Damage to take"). Slasher takes Rounddown (55x1.1) + (Rounddown (55x1.1) + 200 x 0.25) x1.1 = 189 points of damage to its health and is left with (11 / 200) x 50 = 4 points of headhealth.

• Maximum ZED size scale - x3 (achieved on death), size change interval - x0.1.
• Custom gravity factor for inflated killed ZEDs = -0.57 (for comparison, the default gravity factor is "1").
• Explosions are purely visual and do not damage players.
• Inflation explosion timer - 1.7 seconds.
• Each wave contains only 70% of the base wave AI amount.

ZEDs have their health and headhealth adjusted by following multipliers:
ZED:	Health scale:	Head health scale:	Regeneration
Abomination	x0.5	---	1%/s
Alpha	x2	x2.5	10%/s
AlphaKing	x1	x1.2	10%/s
Bloat	x0.4	x1.5	10%/s
Crawler	x3	x6	10%/s
CrawlerKing	x3	x6	10%/s
Cyst	x2	x2.5	10%/s
Fleshpound	x0.35	x2	10%/s
Gorefast	x1	x3	10%/s
Gorefiend	x0.75	x1	10%/s
Hans	x1 (shield - x1.25)	---	0.5-1%/s
Husk	x1	x1	10%/s
King FP	x0.75	---	1%/s
Patriarch	x1.1	---	1%/s
Quarter FP	x0.7	x0.75	10%/s
Scrake	x0.5	x1	10%/s
Siren	x1	x1	10%/s
Slasher	x2	x2.5	10%/s
Stalker	x3.5	x5	10%/s
Hans Volter's HP % regeneration rate increases linearly from 0.5% to 1%/s according to the CURRENT PLAYERS / MAX PLAYERS ratio.

Zed Time

Killing Floor 2 horzine weekly outbreak
Zed Time
All the Zed Time in the world.
Ever think that life is passing you by? Not in this outbreak! You'll be in Zed Time any time you're near a Zed.
Start Date
End Date
		Killing Floor 2 Weekly Outbreak - ZED Time
Outbreak Completion Reward
	Weekly | Fleshpound Visor
Related Achievements

All the Zed Time in the world.

Gameplay specifics

• Permanent ZED Time: ZED Time is always ON, players may leave ZED Time into the partial ZED Time when being at the certain distance from ZEDs. ZEDs have increased spawn rate. Lvl 25 perks are OFF.
• ZED Time slomo scale - x0.5.
• Distance to ZEDs to enter ZED Time - 14.5 meters.
• Distance to boss to enter ZED Time - 20.48 meters.
• Height to enter / leave ZED Time, when within ZEDs vicinity - 5.12 meters.
• ZEDs spawn much faster (x15 spawn rate multiplier). Spawn points have no de-rate time (are always "good" to spawn).
• Stalker has a 7% chance to be replaced by Scrake. No such replacement allowed during the boss wave.
• ZED Time ends when 6 or fewer ZEDs remain
• Each wave contains only 50% of the base wave AI amount.
• Level 25 skills are inactive in this mode.

ZEDs have their health and damage adjusted by folling multipliers:
ZED:	Health scale:	Damage scale:
Abomination	x0.8	x0.85
Alpha	---	x0.6
AlphaKing	---	x0.6
Bloat	---	x0.6
Crawler	---	x0.6
CrawlerKing	---	x0.6
Cyst	---	x0.6
FP / QP	---	x0.6
Gorefast	---	x0.6
Gorefiend	---	x0.6
Hans	x0.7	x0.7
Husk	---	x0.6
King FP	x0.8	x0.85
Patriarch	x0.8	x0.85
Scrake	---	x0.6
Siren	---	x0.6
Slasher	---	x0.6
Stalker	---	x0.6
Stalker has a 7% chance to be replaced by Scrake. No such replacement allowed during the boss wave.
ZED Time goes off when there is only 6 AIs remain during the wave time.
Each wave contains only 50% of the base wave AI amount.
Level 25 skills are inactive in this mode.

Beefcake

Killing Floor 2 horzine weekly outbreak
Beefcake
Bigger they are, harder you fall.
In this outbreak, Zeds increase their health, size, and reach when they hit players or are affected by certain Zed abilities.
Start Date
End Date
		Killing Floor 2 Weekly Outbreak - Beefcake
Outbreak Completion Reward
	Weekly | Horzine Armor | Precious
Related Achievements

Bigger they are, harder you fall.

Gameplay specifics

• ZEDs get stronger: Each time ZED deals damage to aplayer, is rally boosted, is within the AOE of Siren's scream attack or takes poison damage left by killed Elite Crawlers, it's health and size are increased by the listed value.
• Difficulty - Suicidal, Waves - 7.
• Stats increment happens for every ZED individually.
• Health increment affects both - ZED's max health and ZED's current health. Maximum health increased according to the listed %, if by the moment of health growth the ZED is missing some HP, its current HP value will be increased by (DEFAULT HP x % INCREMENT) amount of the points, but will never be more than its new max health value. In other words ZED will be healed by the given %.
• Unlike body, ZED's head does not scale up. Its HP and size remain the same.
• Each wave contains only 75% of the base wave AI amount.

ZED / Action	Body size increment, when ZED is under effect of:				Max increment
	Does damage	Rally boosted	Siren scream	Poison cloud
Abomination	1%	1%	1%	1%	x1.25
Alpha	5%	5%	2%	2%	x1.5
AlphaKing	5%	5%	2%	2%	x1.5
Bloat	5%	10%	2%	2%	x1.25
Crawler	10%	5%	2%	2%	x1.5
CrawlerKing	1%	5%	2%	2%	x1.5
Cyst	5%	5%	2%	2%	x1.5
DAR Trapper	5%	10%	2%	2%	x1.25
DAR Blaster	5%	10%	2%	2%	x1.25
DAR Bomber	5%	10%	2%	2%	x1.25
Fleshpound	5%	20%	2%	2%	x1.25
Gorefast	5%	5%	2%	2%	x1.5
Gorefiend	5%	5%	2%	2%	x1.5
Hans	1%	1%	1%	1%	x1.25
Husk	5%	10%	2%	2%	x1.25
King FP	1%	1%	1%	1%	x1.25
Patriarch	1%	1%	1%	1%	x1.25
Quarter FP	5%	20%	2%	2%	x1.25
Scrake	5%	20%	2%	2%	x1.25
Siren	5%	5%	2%	2%	x1.5
Slasher	5%	5%	2%	2%	x1.5
Stalker	5%	5%	2%	2%	x1.5

ZED / Action	Health increment, when ZED is under effect of:				Max increment
	Does damage	Rally boosted	Siren scream	Poison cloud
Alpha	90%	50%	50%	50%	x4.5
AlphaKing	90%	50%	50%	50%	x4.5
Bloat	20%	20%	20%	20%	x3
Crawler	90%	50%	50%	50%	x3.5
CrawlerKing	90%	50%	50%	50%	x4.5
Cyst	90%	50%	50%	50%	x4.5
DAR Trapper	20%	20%	20%	20%	x2
DAR Blaster	20%	20%	20%	20%	x2
DAR Bomber	20%	20%	20%	20%	x2
Fleshpound	0%	0%	0%	0%	x1
Gorefast	90%	50%	50%	50%	x3
Gorefiend	20%	20%	20%	20%	x2
Hans	0%	0%	0%	0%	x1
Husk	20%	20%	20%	20%	x2.5
King FP	0%	0%	0%	0%	x1
Patriarch	0%	0%	0%	0%	x1
Quarter FP	0%	0%	0%	0%	x1
Scrake	0%	0%	0%	0%	x1
Siren	50%	50%	50%	50%	x3
Slasher	90%	50%	50%	50%	x4.5
Stalker	90%	50%	50%	50%	x3