Valve has announced a beta build of Left 4 Dead 2
for Linux is now live. Left 4 Dead 2
owners should see a special beta version of the game in their Steam library; if not, a client reboot is required.
The Linux beta offers access to the Extended Mutation System
, authoring tools and dedicated servers – on par with what's been available to PC and Mac versions of the title. This latest beta build also offers updates for Windows and Mac users, plus cross-play between all three platforms.