Digital Restrictions Management
DRM stands for Digital Rights Management, which is a new fancy word for copy protections like forcing the player to be always online while playing singleplayer games, or preventing him from playing it on other computers. This article covers the most important aspects about DRM in games.
Don't add DRM.
We discussed everything there is to know about Digitial Rights Management. This topic can be very difficult, hopefully this article can help you with your decision.