Eearlier this week, Kenneth Paolini mentioned information about an Eragon video game, as well as an Eragon RPG that are in the making.
There is, as you have correctly surmised, a great videogame, RPG,
computer game in Eragon. The Fox 2000 company (the movie studio) owns the games rights. There is substantial interest from the major game companies. It will happen.
I don’t know about you, but I can’t wait!