Because of the way that steam UI works, when you have a long list of games in a festival, if you click into the details of any game, you need to scroll through all the offerings again in order to view other games that look interesting in that same category.

Since you've already grouped these games by category, why not leverage your 'discovery queue' system to put them all together and give consumers a chance to choose to view all the festival games in the category as a queue?

This feels like it's a lot easier then using the back button and then rescrolling through all the titles you've already clicked into, and helps give these games more exposure by having players potentially take a more detailed look at each game for a similar amount of time and effort.