Here's a database of external links for most of the project2612 sets. Some links are missing, but they can be added in later, I suppose.
http://chiptune.ninja/tools/p2612/pj2612_games.csv (TAB separated).
I now need ideas on how to implement this on the site, in effect, how to take advantage of these links. Outgoing links are said to increase page rank btw.