The Adventure Company announced today it has shipped The Omega Stone: Riddle of the Sphinx II for the PC. The second in the Riddle of the Sphinx series, this title takes gamers on an incredible adventure. The Omega Stone sends intrepid explorers on a quest to prevent a terrible disaster prophesized by the ancients. Beautiful rendered scenery from Stonehenge, Easter Island, and the Lost City of Atlantis sets the tone for this evocative mystery.