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Perks are the playable classes of Killing Floor. There are a total of seven different perks, all with different specialisations, these being Field medic, Support specialist, Sharpshooter, Commando, Berserker, Firebug and Demolition. Each perk has seven levels of experience, from 0 to 6. Experience is gained by performing certain actions, the most common of which being to deal damage with weapons specific to that perk but also includes other actions like welding or healing. When enough experience points have been gained a player will level up in that perk and gain additional benefits for doing so. The perk and level of a player is detailed on the head-up display as an image and a number of stars. Players using perks at level 0 to 5 will have a red icon and a number of red stars equivalent to their level. Players at level 6 will have a gold icon and a single gold star. Your perk is selected prior to starting a match and can then be changed once per downtime.

Field medic[edit]

Icon for the Field medic.
Main article: Field medic

Players using the Field Medic perk gain bonuses with the medical syringe, and combat armour; as well as the MP7M, MP5M, M7A3, and Schneidzekk medic guns. They also get increased movement speed, resistance to Bloat bile, and more effective armor. Due to the nature of the perk, Field Medics are free to use virtually any weapon alongside their medic guns. The Field Medic's main job is to maintain the health of other players and they gain experience from doing just that; healing. The movement speed increase allows medics to catch up with other players, except Berserkers, to quickly get within range to heal and to avoid direct danger, such as larger specimens which they may be poorly equipped to deal with. The discounts that medics get on combat armour allows them to buy it alongside their other equipment earlier on, allowing them to take advantage of their increased damage soaking ability with the armour.

The experience thresholds for levels as the field medic are for healing 200 HP to get to level 1; 750 HP for level 2; 4,000 HP for level 3; 12,000 HP for level 4; 25,000 HP for level 5; and 100,000 HP for level 6.


The field medics line of equipment consists of the medical syringe, combat armour, MP7M, MP5M, M7A3 and the Schneidzekk medic guns. All players spawn in with a medical syringe. The field medic spawns in with combat armour upward of level 5, and also the MP7M at level 6.

Medical syringe Combat armour MP7M MP5M M7A3 Schneidzekk
Medical syringe.png Trader Vest.png Trader MP7m.png Trader Mp5Medic.png Trader M7A3.png Trader KRISS.png

Support specialist[edit]

Icon for the Support specialist.
Main article: Support specialist

Support specialists gain bonuses with all shotguns, grenades, the welder, and their carry capacity. As would be expected from their name, they are an effective support class, having increased ability to weld doors and carry equipment. Their primary weapons of choice are the shotgun, hunting shotgun, combat shotgun, HSG-1 shotgun, Vlad the Impaler and AA12 auto shotgun.

The experience thresholds for support specialist are based on damage dealt with shotguns and weld points with doors. The damage requirements are 25K for level 1, 100K for level 2, 500K for level 3, 1.5M for level 4, 3.5M for level 5, and 5.5M for level 6. The welding point requirements are 2K for level 1, 7K for level 2, 35K for level 3, 120K for level 4, 250K for level 5, and 370K for level 6. All players spawn with a pistol, level 5 spawn with a Shotgun and level 6 spawn with a hunting shotgun


The Support specialist's equipment set consists of shotguns and the welder. All players start with a welder. Support specialists spawn with the shotgun at level 5 and the hunting shotgun instead at level 6.

Welder Shotgun Hunting shotgun HSG-1 shotgun Vlad the Impaler Combat shotgun AA12
Welder.png Trader Combat Shotgun.png Trader Hunting Shotgun.png Trader KSG.png Trader Vlad9000.png Trader Beneli.png Trader AA12.png


Icon for the Sharpshooter.
Main article: Sharpshooter

Sharpshooters gain recoil reduction, and faster reload bonuses for pistols, rifles, and the crossbow. They also gain headshot damage bonuses with all weapons and get discounts on handcannons, .44 Magnums, MK23s, M99 AMR, and the M14 EBR. With their primary weapons of choice sharpshooters are given either extreme damage per shot, with the compound crossbow or M99 AMR, or rate of fire, with the rifles or pistols. Sharpshooters can also be effective with other weapons, such as medium sized shotguns and assault rifles, and can match the damage of native classes with those weapons on headshots, however they lack the other bonuses those perks offer.

Sharpshooter perk is one of the easiest and fastest leveling perks in the game, with enviable power to kill anything at any range to boast with. Sharpshooter starts simple by keeping distance but as they gain ranks, swift reloads of rifles and quicker eliminations will give them a flexible position instead of standing way behind. This ensured by a Commando or a Support Specialist at their side for sweeping away any trash specimen. At high levels, Sharpshooter can experiment with high headshot multiplier off perk firearms without high penalties too. Their rifles and pistols only at great disadvantage against Patriarch as he can go into minigun stance to negate most of headshot damage.

The experience thresholds for sharpshooter are based on headshot kills with the pistols, rifles and the crossbow. The requirements are 30 for level 1, 100 for level 2, 700 for level 3, 2500 for level 4, 5500 for level 5, and 8500 for level 6.


The Sharpshooters armoury extends to all side-arms, sniper rifles and the crossbow. All players spawn in with a 9mm tactical pistol, level 5 Sharpshooters spawn in with the lever-action rifle and level 6 spawn with the Crossbow.

9mm tactical pistol Lever-action rifle .44 Magnum MK23 Handcannon Crossbow M14 EBR M99 AMR S.P. Musket
Trader 9mm.png Trader Winchester.png Trader Revolver.png Trader MK23.png Trader Handcannon.png Trader Crossbow.png Trader M14.png Trader M99.png Dirty Trader Single Piston Long Musket.png


Icon for the Commando.
Main article: Commando

Players of the commando perk gain bonuses with assault rifles, reload speeds of all weapons, and information gathering; they can see through invisibility and can see the healths of specimens, within a level dependent distance. Their primary weapons of choice are the bullpup, the AK-47, M4 carbine, FNFAL ACOG, and the SCARMK17, but they can also effectively use other weapons thanks to their all inclusive reload boost. With their assault rifles they have a choice of two firing modes, semi- and fully-automatic, for either accuracy or damage.

Commando perk serves as a back bone for a holding team and a leader while kiting with their cover fire and ability to carve a pathway among trash specimen easily. Commando reaches its near full potential early as level 3-4 for trash clearing just to level up rather slow compared to other perks. When kiting, they can lead the team from the upfront, clogging the sightline for denying any surprise spawns ahead. As they progress, they not only become more efficient at sustaining their cover fire but also they gain the freedom to utilize off-perk firearms with their overall faster reload bonus.

The experience thresholds for commando are based on damage dealt with assault rifles and Stalker kills. The damage requirements are 25K for level 1, 100K for level 2, 500K for level 3, 1.5M for level 4, 3.5M for level 5, and 5.5M for level 6. The Stalker kill requirements are 30 for level 1, 100 for level 2, 350 for level 3, 1200 for level 4, 2400 for level 5, and 3600 for level 6.


The Commando line of equipment mostly consists of assault rifles, but also includes grenades, despite having no bonuses to them, so really it shouldn't be included. Everyone spawns with three grenades, level 5 Commandos spawn with the bullpup and with the AK-47 instead at level 6.

Grenade Bullpup Tommy gun AK-47 M4 MKb42 SCARMK17 FNFAL ACOG
Trader Grenade.png Trader Bullpup.png Trader Thompson.png Trader AK 47.png Trader M4.png Trader MKB42.png Trader Scar.png Trader FNFAL.png


Icon for the Berserker.
Main article: Berserker

Berserkers gain bonuses for melee weapons, damage resistance, and movement speed. They excel at front line combat and can take on larger specimens by taking advantage of the flinch and stun effect, while dodging attacks. However as Berserker can easily withstand any specimen; being overwhelmed, ranged attacks and too high damage spikes from a strong specimen like Fleshpounds and the Patriarch would cause him grief. Ambush tactics can work quite well against the Siren and Husk and their ranged attacks can be interrupted, but a sidearm may be required to take on Crawlers.

As Berserkers don't like getting overwhelmed, you can see them kiting or holding with the team next to a reliable shield like Firebug or cover fire from Commando to keep them safe. Berserkers at level 3+ can perform on holdspots at high difficulties with some care from teammates, and they gain their independence to solo kite freely with increased damage resistances as they climb to level 6.

The experience thresholds for berserker are for dealing melee damage to specimens. The requirements are 25K for level 1, 100K for level 2, 500K for level 3, 1.5M for level 4, 3.5M for level 5, and 5.5M for level 6.


Berserker equipment consists entirely of all melee weapons (excluding the downloadable content premium Buzzsaw bow). Everyone starts with a knife, level 5 or over Berserkers spawn with a Machete, level 6 Berserkers spawn with an axe and, depending on the difficulty, combat armour as well.

Knife Machete Fire axe Katana Scythe Chainsaw Claymore Buzzsaw bow Dwarfs!? axe
Trader Knife.png Trader Machete.png Trader Axe.png Trader Katana.png Trader Scythe.png Trader Chainsaw.png Trader Claymore.png Trader BuzzSaw bow.png Trader Dwarven Battle Axe.png


Icon for the Firebug.
Main article: Firebug

Players of firebug gain bonuses related to all aspects of fire, the flamethrower, MAC-10, Flare revolver, Trenchgun, and the Husk fireball launcher. Reload speed, ammo capacity (both loaded and total), range, price, and damage of the flamethrower and the Husk Fireball Launcher all receive improvements. The MAC-10, Flare Revolver(s), and Trenchgun also receives improvements to all above stats, with the exception of clip size. Players also get resistance to fire and incendiary grenades instead of frag grenades. Due to the weight of the flamethrower the choice of sidearms are fairly limited; common choices are the MAC-10, Lever-action rifle and flare revolvers. Firebugs excel at dealing constant damage to groups of specimens but at higher difficulties can struggle with more powerful specimens. The reload time of the flamethrower can also cause problems if not timed well with the waves of incoming specimens.

Progress of Firebug is at a mediocre pace, generally finding place at hold positions to shield teammates and overwhelm crowd with bursts. Leveling up allows them to have incendiary grenades by level 3, to clear groups of specimen while taking way less self damage from the explosion of fire waves to go personal. They pair well with a tanking class like Berserker while holding out a lane and some cover fire from a Field Medic or Commando will keep them alive as long as they practice to cease fire at inconvenient moments and aim to line up stacked kills.
At low levels, they only serve as a crowd cleaner and litting too close enraged specimen on fire to cause them to panic for crowd control. As they hit higher levels, they would be able to shield Husk shots and eliminate Sirens while keeping their crowd thinner capabilities. High ranks give them some mobility with their grenades and effective range from tighter spread, but their potential is best channeled at hold spots where they can scorch everything without repercussions from flanking spawn rates.

The experience thresholds for firebug are for dealing fire based damage to specimens. The requirements are 25K for level 1, 100K for level 2, 500K for level 3, 1.5M for level 4, 3.5M for level 5, and 5.5M for level 6.


The flamethrower, MAC-10, Husk fireball launcher, Trenchgun, and, if you buy the downloadable content weapons, the flare revolver are the only pieces of equipment specific to Firebugs. They spawn with the flamethrower at level 5 and (in addition to combat armor) level 6. At level 3 Firebugs also get incendiary grenades.

MAC-10 Flare revolver Flamethrower Trenchgun Husk fireball launcher
Trader Mac 10.png Trader FlareGun.png Trader Flame Thrower.png Trader TrenchGun.png Trader Huskgun.png


Icon for the Demolition.
Main article: Demolition

Players of the demolitions perk gain bonuses in all aspects of explosives; the damage they deal, the cost of them, their resistance to them, and the carry capacity of pipe bombs and grenades. Their primary weapons of choice are the M79, M32 Grenade launchers and L.A.W., along side their M4 rifle with under-slung M203 grenade launcher. They also have frag grenades and pipe bombs, but will usually also require a sidearm such as the M4 203, or an offperk weapon (such as a pistol), for protection in close encounters. With the L.A.W., they will only have 1 weight slot available, this can be filled with either pipe bombs or a machete.

The experience thresholds for demolitions are for dealing explosives damage to specimens. The requirements are 25K for level 1, 100K for level 2, 500K for level 3, 1.5M for level 4, 3.5M for level 5, and 5.5M for level 6.


Demolitions equipment is occupied by explosives and grenade/rocket launchers. Demolition players can carry more grenades with every level, and spawn with a pair of pipe bombs at level 5 and over, and with the M79 Grenade launcher at level 6.

M79 Pipe bomb M32 L.A.W. M4 203
Trader M79.png Trader Pipe Bomb.png Trader M32.png Trader Law.png Trader M4 203.png
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