They battled through mid-air, causing the aircraft to do an emergency landing, but before the heroes could capture the plane they were shot by the Ptolemaics from an abandoned building. After Marco, Tarma, Eri and Fio crippled the base, the Ptolemaic AIRFORCE-01 escaped from the airstrip together with the secret files. Squad and the S.P.A.R.R.O.W.S units were faced by the army with advances in technologies of the Slug files.Īs they finished off the Oversized Units of the Ptolemaics, they discovered the secret Air Force factory and air strip of the antagonists, thus knowing that the Ptolemaic Army had all the capabilities for a massive invasion of the world. This led to the Corridor of Fire, where the Ptolemaic Army is excavating the ruins, as well as other parts of the jungle. The four hardened soldiers (Marco, Tarma, Eri, Fio) were dispatched in hot pursuit to retrieve the important stolen files. Several years later, the heavily funded Ptolemaics were able to use this information to steal the Metal Slug secrets and prepared to take over the world. The Amadeus Syndicate was able to send information (as seen in the credits of Metal Slug 4) to the Ptolemaic Army before their facility got ran out by the Regular Army. Metal Slug 5 Elite's story occurs before the massive invasion of the Ptolemaic Army after the said group stole the Metal Slug Super Vehicle's secret files. The original version said that the game manifested worldwide by the attacks of the Ptolemaic Army, and the stealing of the Metal Slug secrets.