- All Test prints (I've seen Pre-Alpha and Pre-Beta cards I believe). Which other are there? Probably many I've never heard of.
There are no Pre-Alpha or Pre-Beta Test Prints that I'm aware of.
I suspect that you are getting Play Test cards confused with Test Prints
Play Test cards are meant for testing the playing of the game. They are usually printed on small paper bits or on stickers stuck to real cards.
Test Prints are meant for testing the printing process to see what the finished product will look like.
Play Test Forests exist in quite a few varieties, at least up until 1996.
There are several different Pre-Alpha ones, some of which were for other sets like Ice Age, Menagerie, & Spectral Chaos, that also hadn't been finished yet. Play Test Forests also exist for Portal.
It would seem silly to Play Test basic lands after the real cards had been printed. They could just use real land cards when Play Testing at that point.
For Test Print Forests, you'll have
German with French Copyright
8th Edition (probably foil & non-foil, and maybe some variations)