Killing Floor 2 recently launched its Summer Event ‘Back and Kickin’ Brass’, and to celebrate, Tripwire Interactive has made the game free for everyone on Steam this weekend, with a generous discount also available for the base game.

The free trial period is on now and ends at 10 am PT/1 pm ET on June 25.

During this time you can try out the new ‘Back and Kickin’ Brass’ event, a steampunk-themed update that adds a new “Transport” Objective mode, and a new map called Steam Fortress. It also includes limited-time skins, objectives, and cosmetics, and the return of Zeds from 2018’s Summer Sideshow event. The event draws to a close on July 31.

If you enjoy the free trial, there’s currently 67% off the base game, making it $10.

Killing Floor 2 is out now on PC, PS4, and Xbox One.