I'm super curious on this too. I imagine at least a couple community managers and a PR person. So much of game dev is your community. Maybe a branding artist. Web dev for the website/java applet integration. It sounds like they were pretty well structured capital wise so definitely someone in payroll/accounting. But that's _still_ not 25.
I suppose someone had to be running servers, payment systems and so on as well. It is not exactly trivial to distribute and process as many copies as they sold.