An anonymous reader writes: A group of hackers known as OurMine have attacked Pokemon Go's login servers, making it all but impossible for players to get online. The group says they hacked the game in an effort for the game to be more stable. They want to show the developers behind Pokemon Go that the app can and should be made more secure. Prior to the hack, the servers have been shaky as interest in the game has spiked. But over the weekend, users faced the most extreme connectivity issues yet. "No one will be able to play this game till Pokemon Go contact us on our website to teach them how to protect it!" the group wrote on its website. A different hacking group, which claimed to be part of OurMine, said that the latest attack had been launched after the huge outage caused by a group called Poodlecorp, on Saturday. "The group makes money from charging for vulnerability assessment, where hackers attempt to break into corporate networks to check how safe they are," reports The Independent. A representative said via Twitter that the group wasn't requesting money from those behind Pokemon Go, and that OurMine "just don't want other hackers [to] attack their servers." It should come as no surprise to see that the servers have been having trouble keeping up with demand as Pokemon Go has become the biggest mobile game in U.S. history after launching just about two weeks ago.