checked-no =>Gold Bonuses: If you beat a level and meet the various bonus requirements, you will receive a gold medal. Collect enough gold medals to unlock bonus levels and features. * 03: Rome: Praetorian Camp * 05: Rome: Forum Romanum * 07: Rome: Forum of Trajan * 09: Rome: Addressing the Senate * 12: Rome: Caesar's Sanctum * 15: China: The Silk Road * 18: China: Gate of Supreme Harmony * 22: Atlantis: The Steam Tower * 24: Atlantis: Geothermal Tunnels * 26: Atlantis: Corridors of Power * 31: Gallery Mode * 32: All Weapons * 34: Infinite Ammo * 41: God Mode