We are going to continue to support linux in future products, but unfortunately it doesn't look like a strong business case can be made for it. The mac version outsold the linux version by quite a bit, and even that didn't hit 5% of the windows sales. Mac versions are still valid business cases, because the support is way easier than on either windows or linux platforms, and the sales numbers amount to something noticeable.
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Loki wants to get away from making games "convertable" between platforms, to force linux players to buy the linux boxes. I have issues with this. Not making executable binaries available online sucks. I hate binary patches, and requiring either patches from different versions, or the installation of all previous patches. Just releasing a new executable is so much easier.