Tripwire Interactive just notified the press of a new massive (and free) update for Killing Floor 2, titled INCINERATE ‘N DETONATE. According to the studio, this adds around 50% more content to the game; President John Gibson said:

　　With the Incinerate 'N Detonate Free Content Pack we're adding over 50% more content to KILLING FLOOR 2 than when we launched a few months ago. We're also excited that this release was heavily shaped by the feedback we've received in Early Access to dial in the game to what the players want.

　　Here's a full list of what players will find in this update:

　　2 New Perks  – Firebug and Demolitions, each with new weapons and grenades2 New Maps  – Evacuation Point and CatacombsNew Weapons – More arsenal to destroy Zeds with such as the Dual 9mm PistolsCrossover Promotions:For players who own Chivalry – Playable Knight character with the Zweihander swordFor players who own Red Orchestra 2 – Anton Strasser playable characterNVIDIA PhysX Flex Technology – Featured for the first time ever in a game, KILLING FLOOR 2 incorporates this ground-breaking new technology (for NVIDIA GeForce 770’s and above cards)Berserker Skill Tree – Complete overhaul revamps the Berserker skill tree to a whole new levelAfter Action Report – New system adding Team Awards, Personal Stats and Map VotingMap Voting allows players to vote on the next map, winning map travels to server afterKick Voting allows players to vote kick a player from the mapNew AchievementsZed Hit Zones – Allows Areas on the Zeds to have different hit effects and vulnerabilities based on different zonesNew Steam Workshop functionalityGeneral Fixes and Improvements:Audio Fixes – Huge overhaul to improve audio systemOld map and skill tree refinements such as the Commando skill treeAnd Much More!That's not everything, though. Killing Floor 2 will be playable for free on Steam from September 3 to September 6, and there will also be a 33% discount in case you want to purchase it.

　　Killing Floor 2 will also appear on SteamOS and PlayStation 4 platforms at later dates. Check out the trailer for this new update below!