A huge project to collect absolutely every build of every pony game is under way. They have a spreadsheet for the big data pile with access via requesting from here, and a website called Pony.games for actually listing them.
Right now there are a whopping 979 archived games, and 1785 games in total, with multiple builds of each in a lot of cases.
They are also looking for help if you want to join. Email here. They are looking for more people to help.
