Will someone Explain to me what PSO Plus is?

[Xero_Silvera]

Subject name says all, plz explain.. i havnt ever heard of it until i saw it on forums. http://www.pso-world.com/psoworld/images/phpbb/icons/smiles/icon_razz.gif
-xero

[Para]

Phantasy Star Online Episode I&II
http://www.pso-world.com/psoplus.php
Practically explains it all http://www.pso-world.com/psoworld/images/phpbb/icons/smiles/icon_smile.gif

[XeNoCiDe]

all it is, is an upgraded version of pso ep. 1 and 2 because it has a bunch of stuff from online like some guilds a new level challenge mode for ep 2 and some other things but sadly it was only released in japan