This is another huge topic that I should come back to later, but in the meantime here’s an article, mostly about the British type-in scene, from Wireframe Magazinne last year. It mentions the longest type-in game ever, Axys: The Last Battle (Youtube), an Amstrad program that had to be printed in five successive issues, and what it calls the best type-in game of all, Crossroads from COMPUTE!, although I’m dubious about that claim, there were lots of type-ins. It’s definitely great, though. It’s worth a read if you have the time, although who has enough of that these days?
The Rise and Fall of Type-In Games Listings (Wireframe)