sozuke

Hi guys! I remember playing a weird Atari-system at a friend's place, and I've been trying to find it. I'm certain it was the XEGS, it was grey with round pastel buttons. I remember a shooter which probably was Blue Max. The joystick we played it with, however, wasn't the grey 2600-style controller that seems to come with the XEGS; As I remember, it was elongated and had buttons on the side, very much like the 7800-controller. I'm pretty sure it wasn't black though, and at the very least it didn't have the 7800 logo on it. I want to say it was grey as well, but I can't quite remember. It might have been something originally for the Atari computer line, or the amiga perhaps, or some third party thing. I live in Europe, so it might be a european thing only as well for all I know. Any idea as to what kind of joystick this might have been? It's driving me nuts!