Tripwire Interactive has released a content update called Return of the Patriarch for Killing Floor 2, their zombie shooter sequel currently in early access on Steam. Word is: "The brand new Return of the Patriarch Content Pack marks the long awaited arrival of the infamous final boss from the original KILLING FLOOR, the Patriarch! Formerly known as Kevin Clamely, the CEO and founder of Horzine Biotech, the Patriarch has found his way to KILLING FLOOR 2 and he’s back with a vengeance. Feared by all, the Patriarch is even deadlier than ever, with new attacks that very few will be able to survive." This also includes the Zed-conomy and Trading Floor Store that have caused some controversy over their optional cosmetic microtransactions. Here's a launch trailer, and this update offers the following details:

The brand new Return of the Patriarch Content Pack for KILLING FLOOR 2 includes the following:

• New Boss – The Patriarch
• 2 New Maps – Farmhouse and Black Forest
• 1 New Perk – Gunslinger
• 1 New Playable Character - Oisten Jaegerhorn
• Zed-conomy and Trading Floor Store
• Other New Features including server welcome screen, various bug fixes and improvements, steam mod and map workshop added and much more!