This has been around for a long time, Methods to prevent people from playing without a purchase. With newer modes of payment and distribution there had been many efforts to cut piracy, but like a hydra it just continued to evolve with 2 new heads to replace the last one. Recently a new form of DRM emerges like Hercules and finds. This hero is an always online method of DRM to authenticate each copy of the game on the games official servers. Following suite to a typical MMORPGs like the famous World of Warcraft or the original Everquest.
via N4G: pc news feed http://n4g.com/news/1189877/discussion-always-on-drm
via N4G: pc news feed http://n4g.com/news/1189877/discussion-always-on-drm