Close the curtains, plug in your precision-pointer mouse, and axe your social life: Portal is now officially available for Linux.

The revered platform/shooter game had been in a Linux beta since early May. But, from today, Portal for Linux is ‘stable’ and available to buy by all.

If you already own a copy of Portal for PC (Windows) you’ll find a Linux version available for download in your Steam for Linux library.

Anyone else wanting in on the fun can buy Portal for $9.99/£6.99

Portal was first released in 2007. A sequel, Portal 2, followed in 2011.

You can watch a teaser for Portal 2, expected to be made available for Linux later this year, below.