Pretty much what the topic says. To me it's a bit odd that composers, writers and voice actors are typically more famous than gameplay designers. For example for Arkham City I know Dini/Crocker wrote it and Hamill/Conroy did the voices. I have no clue who designed the combat system. For Bioshock Infinite I know Ken Levine wrote it and Baker/Draper did the voices. Have no clue who designed the gameplay.
I dunno, I just think it's unfair and something that has carried over from the movie industry. The real magicians when it comes to games are the gameplay designers imo and they deserve a lot more credit for their hard work. I wish the media would become better at this.