I have to say that the music in Cannon Fodder is the catchiest game tune I can think of. When I was first playing it, I would be humming/singing the tune at work, much to the confusion of my co-workers. ;-)
I used to drive my roommates mad with the music in The Settlers, which I also liked, but not nearly as much as the Cannon Fodder theme.
I don't really remember the music in Hired Guns. Actually, I don't think I have that game. I think a friend did though. Hmm.. Perhaps I'll go looking around.
