Hello! Here is a speedrunning guide I wrote for Phantasy Star 1, more precisely the Any% Sega Ages run. Hope this can help you learn more about the game!

https://docs.google.com/document/d/1L9xxy3bWjbqcYQs6ANj0pBXz8k9DBI6Wo9HXoZb9-Cg/edit?usp=sharing