It looks like there’s a new one release each year since the first was released in 2013.

1. Oktoberfest I
2. Oktoberfest II
3. Oktoberfest III
4. Oktoberfest IV
5. Oktoberfest V

VERSION 5 – 2017

VERSION 4- 2016

VERSION 3- 2015

VERSION 2- 2014

VERSION 1 – 2013