One of the best amazing RTS games ever!
The game is a sort of different RTS than others. In the beginning you only start off with the commander unit which can build entire bases. Then the bases can build units and the units can build even more bases and units. Basically it's a game where everyone starts off with one ACU and in a few minutes they have a huge army ready to attack.
To get resources to build stuff, units can build generators to mine and generator power and mass. There are the 3 basic types of units, land, sea, and air. There are 4 techs or levels of a unit that can be built by upgrading facilities. Tech 4 can make powerful destructive experimental units. There are also nukes which can destroy a large area of the map.
The game runs on powerful stuff and even the most powerful computers can fall and crash to large maps. If you go to far you may accidentally crash your computer.
The only little flaws I see is that the weak air units can easily be destroyed by anti-air units. And that it's hard to keep up with the AI's building speed and it's very time consuming to build even with speed adjustments.