One option is user-added trivia. Our channel has trivia which includes about 10000+ questions based only on classic games (computer and console and handheld and arcade). Most these have been submitted by visitors, though many have been done by the ops as well.
Just set up a trigger for adding them and give instructions on how they should be formatted. And if you want to verify them before adding them, just have ops verify them and then add them to the list.
Our trivia bot has evolved to be quite powerful over the years.
