Operation: Firestorm is an enhancement mod for C&C Generals: Zero Hour. This mod currently features 8 unique playable Generals each with a huge arsenal of new units, buildings and special powers ar their disposal. While the core gamplay stays the same, a number of interesting new gameplay mechanics are added. In addition the overall visual quality is greaty improved, including new models, textures, FX and an improved User-Interface, available in full-HD resolution.
Here's a video showing the new shellmap. You might also spot a few new units and defenses in action as well as some updated effects and sounds.
The map is based on 'Heavy Metal' by NipTheCat