https://www.youtube.com/watch?v=6x2oHIK1xxU
Alpha 9 introduced moddable data files into the game allowing anyone with some basic knowledge of XML to be able to edit game data and mod the game.
In the video above, I walk you through accessing and editing the data files in order to add your own Quest Events into the game. I also show off some of the other areas of the game that can be edited should you wish to explore those further. It's about 25 minutes in length and at the end of it you should be able to easily add your own Quests into the game.
You can find the full post about modding over on the blog.
Feel free to head over to the modding forums and share anything you create. I'll be posting a buildings mod tutorial in a few days.
As I've previously mentioned full workshop support (if-possible) is expected around release for now though, this should satisfy the itch some of you may have to mess with custom content while I slave away on new features / content.
All the best,
Matt