Killing Floor 2 has had many major updates since it's initial Early Access release.
Here is a brief overview of the major updates.
Early Access Release Build
April 21st, 2015
- 3 Maps: Biotics Lab , Burning Paris, and Outpost
- 4 Perks: Berserker, Commando, Field Medic, and Support
- 27 Weapons
- 11 different Zeds
- 1 Boss: Dr. Hans Volter
- 7 Playable Characters
Lord of the Manor
May 26th, 2015
- New Map: Volter Manor
- Collectibles added to all Maps
- 2 Bonus Characters: Classic Briar and Classic Masterson for owners of Killing Floor
Incinerate 'N Detonate
September 1st, 2015
- 2 New Maps: Catacombs and Evacuation Point
- 2 New Perks: Demolitionist and Firebug, each with new weapons and grenades
- New Cross-Promotional Characters: Anton Strasser (Red Orchestra 2), Tom Banner (Chivalry)
- New Cross-Promotional Weapon: Zweihander (Chivalry)
- Berserker Skill Tree Overhaul
- After Action Report: Map Voting, Personal Bests, Team Awards
- Kick Voting
- Zed Hit Zones
Return of the Patriarch
December 3rd, 2015
- New Boss: The Patriarch
- 2 New Maps: Black Forest and Farmhouse
- New Perk: Gunslinger with 6 new Weapons
- New Bonus Character: Oisten Jägerhorn
- Zedconomy implemented
Revenge of the Zeds
April 7th, 2016
- Survival VS Mode (6v6 PVP Gameplay)
- New Map: Prison
- Two New Weapons (Winchester and Crossbow)
Bulls-Eye
June 14th, 2016
- 2 New Maps: Containment Station and Hostile Grounds
- New Perk: Sharpshooter with new weapons
- New Character: Rae Higgins
- Skill changes for Berserkers, Commandos, and Demolitionists
- Changes to Hans Volter boss fight
- Training Floor added
Tactical Response
August 25th, 2016
- New Map: Infernal Realm
- New Perk: S.W.A.T. with new weapons
- Skill changes for the Field Medic, Firebug, and Support
- Zed Resistances revised
- Horzine Elite Bundle added for Early Access Players
Full Release
November 18th, 2016
- New Perk: Survivalist
Tropical Bash
January 19th, 2017
- New Map: ZED Landing
- New Specimen: Gorefiend
- New Weapon: Bone Crusher
- Introduced Multiperk Weapons
The Descent
March 21st, 2017
- New Map: The Descent (first Holdout-Style map) and Nuked
- New Weapons: Spitfire Pistol and Stoner 63A
Summer Sideshow 2017
June 13th, 2017
- New Boss: King Fleshpound
- New Map: The Tragic Kingdom
- New Specimen: Quarter Pounds
- New Weapons: Centerfire Rifle and HZ12 Multi-Action Shotgun
- Weekly Outbreaks added
- Summer Sideshow Zeds
- Summer Sideshow Limited-Time Award: Sideshow Hazmat Suit Bundle
- Summer Sideshow Tickets
Halloween Horror 2017
October 17th, 2017
- New Map: Nightmare
- New Weapons: Hemogoblin, Seeker Six
- The Vault implemented
- Daily Missions implemented
- King Fleshpound and Quarterpounds added to regular gameplay instead of just a Weekly Outbreak
- Halloween Horror Tickets
Twisted Christmas 2017
December 12th, 2017
- New Boss: Abomination
- New Map: Krampus Lair
- New Weapons: UMP SMG and Freezethrower
- Twisted Christmas Zeds
- Twisted Christmas Limited-Time Award: Christmas Pajama Suit Bundle
- Twisted Christmas Tickets
Infinite Onslaught
March 27th, 2018
- New Mode: Endless
- New Maps: DieSector (Endless Exclusive) and Power Core
- New Specimen: Rioter
- New Weapons: AR2011-A1, Mac 10, and Husk Cannon
- New Character: D.A.R.
- Cyberpunk Limited-Time Award: D.A.R. Classic Bundles
- Cyberpunk Tickets
Summer Sideshow 2018: Treacherous Skies
June 12th, 2018
- New Maps: Airship (first Objective-Style map) and Lockdown
- New Enemies: E.D.A.R.s
- New Weapons: Doomstick, M99, Static Strikers
- Weapon Upgrades
- Summer Sideshow Zeds
- Summer Sideshow Limited-Time Award: Steampunk Outfit Bundle
- Summer Sideshow Tickets