I was looking over the Compendium book translation recently for information about the SPEC magazine. In the description of Phantasy Star: Outside Saga (an early PS comic), it mentions that people loyal to Lassic sabotaged a ship Alis and Lutz were on three years after PS1, sending them to another star system for an adventure. Apparently, Lutz learned about techniques there and brought them back to Algo.
The part I don't understand is this: who would have possibly been loyal to Lassic at that point? He had been dead for three years and Alis had passed up the throne (in the comic), so who would be trying to get rid of her?