The knives, in Killing Floor 2, are basic melee weapons, available to the player based on their selected perk, and all count to their respective perks progress. The controls for each of them are:
- Primary - fast slash attack, Hold Primary for combo attack.
- Secondary - heavy slash attack.
- Alt - block/parry.
“Yes, it is actually a lawn-mower blade. Enjoy it!” —Item description
The Lawnmower Blade is the Berserker variant.
“Horzine's version of the classic commando knife.” —Item description
The KF-BAR is the Commando variant.
“ It's a box cutter. Perfect for opening any boxes you may come across on the killing floor.” —Item description
The Utility Knife is the Demolitionist variant.
“It's a firemans knife. You're a fireman, so we're assuming that we do not need to explain to you how to use it.” —Item description
The Fireman's Knife is the Firebug variant.
“The over-sized knife of the Old West. Perfect for slicing and dicing Zeds in the here and now.” —Item description
The Bowie Knife is the Gunslinger variant.
“It's a scalpel. You're a medic, so we're assuming that we do not need to explain to you how to use it.” —Item description
The Scalpel is the field medic variant. It has neon blue glowing parts like all other field medic equipment.
The Kukri is the Sharpshooter variant. It is likely a reference to Team Fortress 2, where the Sniper character uses a kukri as a melee weapon.
“Don't go feeling all special just because we gave you the biggest knife.” —Item description
The Machete is the Support variant. It based heavily on the Gerber Gator Machete line.
The Tactical Knife is the SWAT variant.