The "My Collection" page could have a "has challenges"/"does not have challenges" filter.

The "Challenges"page could have a "I own (all/some/none) of the games filter"

The next release will include a new option on the Challenges page:

• All challenges
• At least one game owned
• All games owned

I'm holding off on any changes to the My Collection page since it's already loaded with filters, but it might be something added down the line.

Also, this is perfect timing because I'll be adding a bunch of new challenges soon