Steam achievements in Civ5/Riddle of the Sphinx

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| || Riddle of the Sphinx
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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?
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Category:Steam achievements in Civ5