My first major project was also a videogame. I made it almost ten years ago, and I still get fanmail about it once a month. I think creative people will create.
Holy crap! Marthon Rubicon was you? Great work man!
I've always thought Marathon was a bit of an under-appreciated masterpiece game, particularly given how old it is. I got stuck into Rubicon after I lost my original install disks (and moved to a windows machine...)
http://marathonrubicon.com/