Frictional Games, the developers of 'SOMA' [Official Site] have released their sales figures. The game sold about 450,000 copies of which 5,000 was from Linux gamers. So that's around 1.1%.
Update: It's worth noting that their overall figure includes PS4 sales. If it was comparing Linux against just PC systems it would have given Linux a higher mark.
Linux accounted for around 5000 direct sales.https://t.co/oZj39DROt9— Frictional Games (@frictionalgames) September 23, 2016
That's completely in line with expectations given our market share on Steam it's about right.
They have said they will continue to support Linux, which is great to hear:
If you're interested, I spoke to a number of developers before [See Here] about their sales on Linux. You can see the latest entry here which links to the previous three before it too.