There is a category of games on the play store called “No WiFi, No Problem.” I do not know how to this from the store but you can search it on Google and get a link.

Yes, Ara really will be a “royalty free form factor.” Google will biuld and sell the skeleton, and anyone can biuld modules to put on it. The have already released an MDK ( module development kit) like the SDK for Android, that outlines the rules for building nodules.