another excellent example is mmos, all mmos eventually shut down, some have people who try to upkeep the game with private servers, others vanish completely. the best example of this I know of is Wildstar, a sci-fi mmo that went under years ago, with pretty much no game files or anything left behind a team of people decided to re-create the game from memory in order to keep the game alive. always online games aren't a bad idea by any means but if it's a single player game with no online features that requires constant connection to a server, that's idiotic at best