And not content with the number of testers in the Beta, we will also be opening up the Beta to all L4D2 owners” Not content to just be the testing ground for the new Extended Mutation System, we will be adding Linux to the Beta. This will available to play on both Windows and Linux as it is testing out the new EMS (Extended Mutation System) update for the Left 4 Dead 2 game – so it is not a Linux specific release but can be played on Linux too. However, Gamers will be able to play the first beta of Left 4 Dead 2 on Linux from next week according to the latest information from the Left 4 Dead blog. However, the process of porting to Linux has clearly been long and complex because we still haven’t got a publicly available working version of Left 4 Dead 2 on Linux. Around 9 months ago Valve told us they could get Left 4 Dead 2 to run faster on Linux than Windows. The possibility of Left 4 Dead 2 arriving on the Linux platform has been around for well over a year now.