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.
I wasn't happy with the highly derivative upgrade model I did, so here's another crack at it. Looks a bit more original and high-tech now (perhaps a bit overly flashy). More team colour added also, should be easier to recognise who it belongs to now...