Again, pretty unlikely. While some of the Archos players have had a completely different, open source firmware written for them (
http://www.rockbox.org/ ), meaning potentially new applications could be written for these players, I don't believe any of the AVxxx series have had new firmwares. Also, bear in mind the controls on these players aren't designed to have several buttons pressed at once (eg. direction and a button, or even diagonal directions), so the games you could realistically play would be severely restricted.