Supreme Commander is a big game, for people who want big armies, big units that make big noises, and even bigger explosions. But if the stock game is not enough for you, don't worry - there are several mods out that can help fulfill your appetite for widespread carnage.
Supreme Commander is a very big game. The spiritual successor to Total Annihilation, Supreme Commander's trademark is huge maps filled with huge numbers of huge units. So huge is its hugeness that this becomes its primary drawback as a game - you need one heck of a system to run a long game of Supreme Commander on a medium or larger map. But if you're got a PC with enough juice to calculate the trajectories of a few thousand pieces of shrapnel, then you've probably found yourself enthralled at one point or another with the sheer carnage the game lets loose.
But eventually that carnage becomes dampened. Dulled. Watching a row of what appear to be walking toasters explode like flaming roses under the laser death-gaze of a a gigantic robot beetle does eventually lose some of its edge. When that happens, you may want to put the game down - but don't. Supreme Commander, like its predecessor, Total Annihilation, does host a modding community, filled with people trying to make the rapid-fire destruction of Supreme Commander even more difficult to keep pace with.
Although the title of this mod - Black Ops - hints that it has to do with spy missions and other secretive stuff, you'd be wrong. This is Supreme Commander, remember - subtle means walking only one giant robot into your opponent's base, rather than five.
What this mod is really about then, is units. This makes it technically less of a mod and more of a unit-pack. But let's not get to picky about the semantics, because the fact remains that even if it is "only" a unit pack, it is a very popular one. It includes numerous units, some of which are insanely destructive and fun to use. In total, there are over forty new units added by the pack, including my personal favorites - user made dreadnoughts. Black Ops includes several, including the not-so-creatively named Bismark, a UEF battleship with massive cannons capable of raining down destruction from far, far away.
Besides the mega-units though, Black Ops also includes some utility players, like the Advanced Air Station, which is a sort of front-line resupply base for air units. Its not as exciting as massive battleships with a billion cannons, but its still useful.