Go through time and space revisiting beloved levels from Sonic the Hedgehog all the way to Sonic Colors remastered in stunning HD graphics as either Modern Sonic or Classic Sonic to defeat the evil machinations of the Time Eater and save the world once again!
SonicGLvl is a an unofficial tool, developed by Dario ff from sonicretro.org, with lots of additional contributions by the community. It's currently in-development and growing with new features as it's needed. It's capable of editing level layouts and importing brand new geometry into the game. It also includes a Material Editor, a .model exporter to COLLADA to be usable in any 3D Suite, and a .mesh(Ogre) to .model(Sonic Generations) importer. Check out the Google Code project for more info.