Is there any way to transform a solo world into a coop one? I really wish i could play with my friends and keep my progress.

[InternetShibe47]

If this is not available, is it possible that any dev would do this only for me?

 

[GiGaGekkies]

Hey! I'm sorry, but this is not available yet. The developers can't transfer your solo island into a coop island, because if they do this once, everyone else will ask for it too. The best thing you can do is to start again with your friends. I'm pretty sure it will go faster, because you can play with more people on your island. Good luck!