For years, there has been a lot of helpful information about Cythera available to users online. This site is not intended to replace any of those existing resources; rather, I consider it to be but one part of a larger, comprehensive work:
Part A: Slayer's Guide to Cythera (Mirror 1) (Mirror 2) (Mirror 3)
Part B: Pallas' Books and Dialogue Archive (Mirror 1)
Part C: A Reference Guide
Warning: These pages include in-depth explanations and analyses of their content, which may be classified as spoilers for those who have not played Cythera.
Cythera's images, audio, and text are owned by Ambrosia Software Inc.