I'm pretty sure they are put from someone else, instead of set by statistics. If not, then there is something wrong with this whole thing, because there are better games (in terms of rating and plays) that are not in the popular games category. Wonderboy legends has a 5 rating, has 400K plays, and Hands of War has 900K plays and a 8.9 rating. If anything, I don't see why Hands of War should NOT be up there, because this doesn't make sense. So, it should be evident that popular games are chosen, and not selected.