Help Finding A Game (Dreamcast)

There's a game I used to play a LONG time ago, for the Sega Dreamcast, back when I was about 8.

You were this space ship, in an overhead (Birds eye) view. The entire map was basicly a large grid (x-y) going positive and negative.

You had to destroy alien ships (of a few different races. Nomads, etc) and collect the debris from them. You would turn it in to a space station for money, and upgrade your ship. (cargo bay, hull, wepons, etc)

I've been trying to find this game for a few years now, and was wondering if anyone could help me.

Any and all help would be greatly appreciated, I know this is my first post and I'm sorry for makeing it a request-like thing.

We can tell you the name of the game (unfortunately I don't know the name), but we can't tell you where to get it.

I'm aware. All I'm looking for is the name, perhapse a website if at all possible. A name alone would be great though.

I guess no-one knows the name of the game huh? =(

Oh well, thanks anyways.

P.S. Sorry for double post, couldent find the edit button.