Two minute preview of Hydrocity from fan game "Sonic 3D," presented in a Sonic Colors perspective.

Coincidentally, Sunday’s release of this video coincided with a new build release of SonicGDK. Built with the Unreal Engine 3 by Xaklse, the new version 1.00.048 includes mostly technical changes. If you want to try your hand at making something similar to what was seen in the video, your first step is owning a copy of the June 2011 build of the UDK, and then this link.