watch 02:27 The Loop (Games) Do you like this video? Riddle of the Sphinx Rush a wonder as Egypt with a Great Engineer. In Greek mythology, the Sphinx would ask a riddle of anyone who passed by and if they answered incorrectly it would kill them. The riddle was: What goes on four legs in the morning, on two legs at noon, and on three legs in the evening? Retrieved from "https://civilization.fandom.com/wiki/Steam_achievements_in_Civ5/Riddle_of_the_Sphinx?oldid=213276" Categories: Civilization V achievement Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.