https://www.pcgamer.com/moba-super-monday-night-combat-to-shut-down-because-of-new-eu-privacy-laws/

Free-to-play MOBA Super Monday Night Combat is shutting down for good next month because of changes to EU privacy laws, developer Uber Entertainment has announced. The game is now gone from Steam, so unless it's already in your library you won't be able to play it, and even if it is, the servers will go offline on May 24. 

The developer said that the European Union General Data Protection Regulation (GDPR), which was approved in 2016 and will be enforced from May 25, is to blame. GDPR aims to hand individuals more control over their data online, and companies that fail to comply will be met with heavy fines. It's the same regulation that made Steam change its privacy settings earlier this month, which caused havoc for SteamSpy.