999 Games has been publishing 'Catan' since 1998. This game was updated in July 2012 in terms of playing material and artwork. For example, the wooden playing pieces were replaced by detailed plastic playing pieces.

Unfortunately, the wooden and plastic editions of the basic game and the many expansions that the game has had were not always easy to combine. 999 Games therefore comes with this adjustment set, so that the biggest stumbling blocks regarding combining the different editions of 'Catan' are solved.