We didn't have GameFAQs back then -- if a dungeon was complicated, we usually got lost; if a boss was challenging, we usually died. Sega's thoughtful inclusion of a hint book provided a nice alternative to assured failure: possible success -- with a side of failure.
We've excerpted the hint book for your perusal. Check it out if you just downloaded the Virtual Console version of Phantasy Star II and want help getting started, or if you'd just like to see the state-of-the-art in strategy guides circa 1990. If that's not enough (and it isn't), check Phantasy-Star.net for more transcribed information from the book!