This game is AWSOME! It's a huge file, but worth it. It's free.
You can play different classes and different races as follows:
Archer: Don't know which gender, but they can fly, and are special at long range attacks.
Barbarian: Male only, werebeasts, they can take the form of a tiger.
Blademaster: typical hero type. Male only.
Cleric: A healer, female only, they can FLY!
Venomancer: Female only, they can tame anything that's a lower level then them, and can take the form of a fox.
Wizard: Female only, they use magic, of course.
NOT RECOMMANDED for anyone 14 and below.
More info here: http://pwi.perfectworld.com/info/gameinfo