Exactly what I expected-space combat!
This game kinda reminds me of the old Wing Commander series (I'm dating myself here), but without the downtime in the hangar or socializing with the crew. There are human interactions through cut scenes to introduce new parts of the plot or missions, but the primary part of the game is zipping through a massive area around Earth and the moon, shooting down small and (VERY) large craft.
Much of the acting is down right awful, but luckily, the game play holds up. Controlling with a mouse isn't easy and takes getting used to, but there aren't too many controls to memorize on the keyboard. I like being able to re-route power to damaged parts of the ship. The game auto-saves without you knowing, but it seems to be fairly smart and when you die, you don't have to go too far back.
I'm plaing this full-screen on an i7 iMac 2.93 GHz with 8GB ram and 1GB video card (that last bit is important). Don't even try playing this on something slower. It definitely needs the video RAM and horsepower, as there are often many moving objects on the screen.
Overall, very heart-pounding game, mostly non-stopping action. I actually wish there was a little down time without the constant threat of something…but the game delivers on what it sells!