http://www.frozenbyte.com/2014/07/enchanted-enchanted/
"The Enchanted Edition is a free update for the owners of the PC version of Trine. There are added features, most importantly online multiplayer and mid-level saving. The updated version does not impact the original game. Instead, both versions are available and can be selected from the game’s launcher.
At the moment the Enchanted Edition is only available for Windows, but we will be adding theMac and Linux versions afterwards. For now we can’t give a timetable for these yet, but we’ll let you know when it’s time! The game is officially released today on Steam. GOG.com and Humble Store versions will be out really, really soon, so just be patient. :) Console owners will no doubt be happy to hear that we also plan to bring Trine Enchanted Edition available for digital purchase for the Wii U and PlayStation 4 in the future."
