If by PSU you mean Phantasy Star, then the answer would be no. Monster Hunter is basically you going on various missions to kill specific monsters which are much stronger and faster than you, and then using their body parts to fashion new weapons and armor so that you can make upgrades and fight stronger monsters. There really is no real story, it is just incredibly addicting but only if you like a real challenge. The game is not casual by any means and is quite difficult. However, in my many years of gaming, I have yet to find another game that gives such a sense of accomplishment as Monster Hunter. Download the demo and give it a whirl.