The GameAgent Blog updates Linux and OS X gamers on the status of their ports of Sid Meier's Civilization: Beyond Earth, the just-released turn-based strategy game (thanks Ant via GamingOnLinux/Linux Today). They report being able to play through each version and say that cross-platform multiplayer support is in and being tested. They also outline some performance issues they are tracking, expressing confidence that these can be overcome:

Our current focus is on improving performance. So far performance has been the biggest development hurdle as we’re facing an engine based on Direct X 11 vs. Direct X 9, which Civilization V was based on. This upgrade means lots of new driver issues and development hurdles for the team. This is also why our current preliminary system requirements are much higher than Civilization V or the Windows PC version of Beyond Earth. However, our development team is extremely good at what they do, and we expect to make significant strides in performance improvement over the next several weeks.