Its sad to see such a good game fall into obscurity.
The gameplay is difficult to describe. It is in the middle between a simulator and an FPS, with the mouse controls and fast speed of an FPS, but the complexity of a mecha sim. You pilot any one of around 20 hercs and 7 tanks, and each is balanced and has strengths and weakness. Each mech can be customized with a wide variety of weapons and systems. For example, you can choose to put heavy weapons on a light mech to be light and fast, except you won't have any room for shields. Or you can choose to create a mech with big guns that is outmaneuvered easily. You can even create your own skins for your Mechs. Many of the things in this game can be frustrating, but patience rewards players who stick with it.
The story was adapted from the earthsiege universe, where an evil computer called Prometheus builds a breed of machines called the Cybrids to destroy humanity. This sounds uncreative, and in fact it is. But the creators of this game have converted the story into something completely immersing, with exceptional characters. The player can choose to play as the humans and defend humanity against the Cybrids, or can choose to play as the Cybrids and make humans to extinct. Both sides are highly interesting to play. I personally like the Cybrids.
The sound itself is kind of pathetic and muffled, not like the in-your-face explosions of Earthsiege. But the music is excellent, with a good mix of techno, grinding rock, and some electronic-ish music that avoids formal classification entirely.
The graphics aren't good by todays standards, but I like them. They are fairly simple, but quite smooth and very colorful. This game runs on anything nowdays,considering that it is like 9 years old. Mechs break apart into many, many pieces based on where you shoot them, and it is very satisfying to plow through a disabled mech and watch it disintegrate below your feet. The building environments are kind of plain, generally, unless you get a skilled third-party map maker.
This game has a lot to offer. Between the wide variety of weapons and mechs to the completely immersing story and memorable characters and the fast gameplay, this game should have been a classic. Unfortunately it is difficult to learn and it was released at an unfortunate time, assuring it's place in the bargain bin with its predecessors.