Update is now available. A stable version of Factorio has been released to the public. Blueprint flipping is now an option. Disabled for any blue prints that are unable to flip properly. Spiders now have more features. Spider waypoints have been fixed. Spider follow command added. Now spiders can follow each other and other entities. ‘Smart belt building’ fixes the bug for belt building. Built building now also has an underground feature if you build it through constructed material. Wake up lists have been optimized for 20-40% performance gain. Save game speed optimized by 20%. Multi-threaded belts: the player is able to remove some connections making the group contain multiple components which can be extracted to separate groups. While groups merging has to be done immediately (having multiple groups being able to interact with each other would create race conditions), splitting does not.