I seriously think one quest should be called "Earn a Merit." Yeah, that's not for a game, but think about it. When we were using AP, Merits were worth, what, 25 points? 10 at least? People were encouraged to post thoughtful or informative reviews because they'd get points. Since that changed, you don't get anything for a Merit. I don't know how you would do it, but "Earn a Merit" would be a really good way to encourage people to keep leaving useful game reviews.
Yeah, I just got a merit. Believe me, I'm thankful for it. It's the first one I've gotten and I think it's awesome. It just kind of inspired an idea for a quest. You'd also probably want a "Submit a Game" Quest too, since submitting games offered a ton of points but no longer does.
Just my input.