Games
Games and play are some of the highest expressions of thought. They intentionally challenge our intellect, our philosophy of mind, provide intermittent reinforcement, and help develop social relationships.
"Games, then, are a kind of utopia of rules...play can be said to be present when the free expression of creative energies becomes an end in itself. It is freedom for its own sake." -Bernard Louis De Koven
The excellent book, Games: Agency as Art by C. Thi Nguyen provides a definitive philosophy of games, play, agency, and the impact of gamification on our agency.
Barnard Louis De Koven's A Playful Path has a bunch of free resources on how to incorporate play into daily life, and unique games that challenge us in many ways.
Video Games as an Art Form
The Video games as an art form page discusses the philosophy of video games as works of art.