A limited external beta for Valve's new Linux version of Steam will begin in October, the company reported. 1,000 users will test the client, along with "one Valve game," likely Left 4 Dead 2. The beta supports Ubuntu 12.04 and above. It's intended for experienced Linuxians: "For those new to Linux, we recommend waiting for a subsequent release where more features are implemented along with improvements to the user install experience."

The new Linux client will not include Big Picture Mode, which just went into beta on PC and is "coming soon" on Mac.

This article was originally published on Joystiq.