DccNiTghtmare (DNT) is a 3D single-player RPG “in a satirical post-apocalyptical world”, which encourages suggestions to be posted on their forum.
Version 0.9 has been released not long ago, which on the gameplay-side appears to mainly bring new models and audio. We have missed quite a few versions here on Free Gamer though. See the changelog for a complete list of versions and features.
As you can see in the video above, third party art assets were used. They were originally created for OpenDungeons and shared on OpenGameArt end of March 2012.