We have Windoze, we have Mac. Will Spiderweb ever port these titles to Linux? Or perhaps pair with a developer like Aspyr or VP who specifically ports games to Linux?
Not by Spiderweb, no. Last reply in one of the reddit AMA's on the matter was:
I'm afraid our Linux efforts have always ended in horrible failure. Avadon: The Black Fortress was ported because the awesome Humble Bundle people subsidized the port. Sorry about that.
I know this is super-unsatisfying, but at least everything runs on WINE.
Jeff has been pretty adamant on the matter ever since Avadon: The Black Fortress linux port ended up being both commercial failure and support nightmare despite support from Humble.