The free weekend follows this week's debut of the Pyro class update, which offers three new weapons unlockable via 36 Pyro-specific achievements. The update also includes two community-created maps—including Shacker -sk-'s CP_Fastlane—and a new alternate function for the Pyro's stock flamethrower.

Players interested in taking part need only download the game through a Steam client, with full instructions available at the free trial website.