Do game creators get royalties?

Excuse me, I'm a bit curious about something. I've been hearing a lot about the booming game industry lately, and it's made me wonder: do game creators actually receive royalties for their work? I mean, after all the hard work and creativity they put into designing these games, it seems only fair that they should be compensated for the success of their products. So, could you please enlighten me on this matter? Do game creators indeed get royalties, and if so, how does the system work?