https://www.polygon.com/2018/4/28/17295498/super-monday-night-combat-shutting-down-gdpr

Super Monday Night Combat, the 2012 multiplayer online battle arena by Uber Entertainment, is closing down for good next month, saying the cost of complying with the European Union’s new General Data Protection Regulation is too high to keep going.

GDPR, which was passed in 2016 and takes effect May 25 of this year, is legislation that, broadly speaking, involves persons’ privacy and right to control their private information online. Uber, commenting to Polygon, said Super Monday Night Combat uses an older version of its multiplayer back-end system (called UberNet) that is not GDPR compliant.