My private collection of unplayed games currently has 277 games, and the only way to sort this list is by individually moving games up and down the list, one space at a time. I tried to do this a few times when the list was a more manageable size, but for some reason the order got jumbled around a bunch. It'd be nice if I could just sort them all at once by alphabetical order, release date/status, manual order, rating, price, etc.

I imagine this would also be useful for the more conventional ways people use the collections feature, listing games within a series, and listing recommendations.