Total Mayhem takes Total Annihilation, bugfixes and extends it the way Cavedog might have. Early game pace is quicker, many new units added (longtime players may recognise some 3rd-party units), including a whole new 3rd tech level tier. Existing and added units have been bugfixed, rebalanced, re-modeled, re-textured and re-rendered to equal or exceed the standard of the original TA units.
Due in next version (7.0) - a salvo-fire cannon atop an advanced geothermal generator. Quite longish range. Original unit and concept by the Uberhack team. Major cleanup on model, retexture and new art by gamma.