This is a great site I've explored for a while now. Some of the entries are shockingly detailed. Majora's Mask, for N64, for instance has a very long and organized page (https://tcrf.net/The_Legend_of_Zelda:_Majora%27s_Mask) as well as separate pages for the debug and prototype versions (https://tcrf.net/Proto:The_Legend_of_Zelda:_Majora%27s_Mask). The site Unseen 64 (https://www.unseen64.net/) has a similar collection of info on betas/cancelled games.