3rd

Ludology = gameplay is everything
Narratology = everything has a narrative.

I have to lean more in favout of ludolgy. On personal experience, I've played games which have no clear narrative(Tetris), arguments against this seem to impose a narrative rather than reveal an existing one. Having said that, I do love a good story with my games, I play less and less of the more abstract twitch games as time goes by. I'll never be a 100% narratologist though, a good story with poor gameplay is just not an enticing mix. Special mention should go to the Metal Gear series, where the gameplay has remained relatively unevolved next to the cinematic narrative. It's unusual in that the cut scenes have been so lovingly crafted, and yet remain bat-shit insane. Focus on the narrative does not neccessarily result in a quality story.