Trine, Trine 2 now support custom maps via Steam Workshop
Frozenbyte has updated the PC versions of Trine and its sequel to officially support user-generated content.
Trine: Enchanted Edition and Trine 2: Complete Story are now Steam Workshop compatible.
Grab the latest update to enable support, then start subscribing to projects on Steam Workshop. Frozenbyte has also offered a guide to the process.
Some of the best custom maps so far are showcased below.