Arcane Kids have created several unusual freeware games that are worth mentioning here.
I never played any of the original Bubsy games, but apparently the 3D title for PlayStation (YouTube link) was not very good. In late 2013, Arcane Kids released an unofficial sequel, in which Bubsy visits an exhibit in the Los Angeles County Museum of Art.
I won’t say much about this game, except that it’s worth playing all the way through. You’ll need the Unity Web Player to play it in your browser:
This is a high-speed skating game that allows you to explore a colorful world and rewind your mistakes. It resembles Jet Set Radio.
You can download Zineth for PC or Mac here:
This is another game that I don’t want to say too much about. Like Bubsy, it’s a browser game that requires the Unity Web Player: