This document summarizes theories about conceptualizing media change and the evolution of new media. It discusses Roger Fidler's theory of "mediamorphosis" which argues that new media emerge through the transformation and adaptation of old media. The document also outlines principles of mediamorphosis, theories of remediation and how new media languages are derived from old media. It discusses the concept of computer spaces and virtual realities, and debates about whether media evolution should be seen as progression or degeneration. Finally, it briefly introduces the field of ludology and game studies.