Tripwire Interactive has just launched this year’s Summer event for Killing Floor 2.

The Back & Kickin’ Brass event adds a new objective mode, the Steam Fortress map, and two weapons: the Seal Squeal and the Hemoclobber. There’s also tons of other tweaks and changes to the game itself that you can read about here. You can find a trailer for the event above. The event will run until July 31st.

Killing Floor 2 is also having an extended free weekend on Steam that lasts until the 25th.

Killing Floor 2 is available on Windows PC (via Steam), PS4, and Xbox One for $29.99.