From the announcement:
We have an exciting little treat for you today – the first of our mini-adventures for Tails of Equestria is available now for download!
What is a mini-adventure?
Well there is a wonderful game called Tails of Equestria, a game of storytelling and role-playing in which players take control of their very own pony characters to embark on epic adventures across Equestria. They may be saving towns from dragons or stopping a curse from enchanting the ponies of Ponyville, these adventures often take many sessions to complete. A mini-adventure is a little game that can be wrapped up in less than an hour and usually fits in really nicely between other adventures or as an aside, great if not everyone can make it to the game and you don’t want anyone to miss out on the main storyline!