ProSiebenSat.1 Games is the publisher of Europe and North America version of S4 League.
S4 League was first published in 2008 by Burda:IC GmbH and its game portal, Alaplaya, for European players only. Later, Burda obtained a licence for North America, too.
In 2010, Burda:IC was acquired by ProSiebenSat. 1 Group that transformed the company and the portal into ProSiebenSat1. Games GmbH. The company started to shutdown some of the games published under Alaplaya. Many of the games have separated and they now have their own portals- like S4 League. Alaplaya is still running one game. S4 League now has its own portal.