Quoting: Maelrane

Quoting: GuestValve had their Dev days awhile back, where they practically gave everyone the knowledge and tools to publish a game on Linux. Not to mention that Contagion uses the Source engine, which should be one of the easiest to port with Valve holding their hand all the way. I agree with everyone else, platitudes and promises have zero substance in this industry without something we can sink our teeth into every so often to show actual progress.

While I agree with the rest it really depends on the version of Source they've used initially.