When I saw 'ET Total Conversion', I was sort of hoping for a moment that your post would be about a game where you fly bicycles around in aerial combat with an alien huddled in the front basket.
The more I think about it, the more I think that needs to be created. But not by the official folks. If Spielberg touches it, then each bicycle would be equipped with walkie talkies instead of 'Turn on Your Heart Light' lasers.