Very recently the Civilization 5 Steam achievements were updated and a number of new achievements were added. While this may seem like a fairly trivial matter the only time that additional achievements are added is when new content is on the way. There were 11 new achievements added, thus it is likely that we are on the verge of receiving another small DLC, perhaps on the scale of the Inca and Spain pack or the Polynesian pack. The amount of achievements would indicate that it is something much smaller than an expansion. The image is featured below for your perusal.