I mean it. As an experienced narrative designer of video games, I dare say video game scripts have much more in common with play scripts than with prose fiction. Games are like immersive plays. You lead the players through a journey, play with them, grant them satisfaction, make them sympathize with your own characters and so on. Mostly they just watch what you present. Sometimes they interfere (in a very limited and contrived way). Audiences participate in a play in a very similar way to that gamers do games.