I just bought The Binding of Isaac during the steam holiday sale, I really enjoy the game and it made me notice something. Lately there have been a lot of games that randomly generate the world every time you start a new game, Binding of Isaac is one, but there is also Terraria, Minecraft, Dungeons of Dredmor, the Civilization series, and even Skyrim does a little bit with the never-ending quests. Those are just off the top of my head, so are more developers opting to have random worlds to extend the life of the game or did was it just a coincidence that I've played all these games around the same time?