. "Skyscraper Simulator (formerly Skyscraper Project), also known as Skyscraper Sim, Skyscrapersim, Skyscraper 3D, or simply Skyscraper is a free and open-source 3D building simulator created by Ryan Thoryk, currently utilizing the OGRE graphics rendering engine, and formerly using Crystal Space."@en . "\"January 31, 2015 (Alpha 1.9/2.0 Alpha 9) build\" (OGRE)" . . . . . . "Skyscraper"@en . . "2.0 Alpha 9 Update 2 (OGRE)" . . . . "Active" . .