I say on the first 20 or so... (at the end) - generally... design, art and co producer in the early days... more recently I've been a manager... with aspects of game design and graphic developement, although the latter not as much as in the old days, more of an advisory role and when things got tough I'd help out, and technically resolve problems (in a graphical sense) when conventions were broken (too many colors being used or bad pallette management being a prime example)