Tripwire have announced that Killing Floor 2 will be released on the 21st of April into Early Access, but we have it confirmed Linux is not in the initial release.
I'm pretty sad about this, as I was hoping it would give me my Zombie fix once I finish Dying Light. It's not all doom and gloom though, as we should still get it in a reasonable time frame given their wording.
@gamingonlinux Unlikely at launch. We hope to add it as soon as possible.— Tripwire Interactive (@TripwireInt) April 7, 2015
About Killing Floor 2
Killing Floor 2 will be the successor to the ridiculously fun and successful original title, that was released in 2009. All your old favourites will be back, with a whole host of new features, characters, monsters, weapons and story in due course.