That came out just about the same time as the AH beta came out, didn't it? Yup, the co-op was a blast. If I remember it right though, it could get pretty flaky and with just 2 other people besides yourself the net play got even flakier and would freeze up to the point of almost not being worth it. I played with the same 2 guys so the culprit could easily have been one of us. Loved that game though... when it came out I don't remember there being another like it.