I collect a guide to cross classing , from the questions and answers you will find the details about cross classing of RF Online .

What is Cross Classing for RF Online Gold ?

Cross Classing is a way of changing your characters talents away from the original path that you may have taken. For example a Warrior could change his class into one of the second tier Ranger classes at level 30 rather than continuing his path down the warrior tree.

How could this benefit my character?

Crossing with another Class allows your character to then use all three tiers of another class type as well as your original classes. For example a Warrior could change into a Ranger at the level 30’s class change and will then be able to use all of the tier 2 skills for the Ranger and Warrior, then on class change at level 40 use all of the tier 3 skills for the Ranger and Warrior also.

Please note any extra skills gained will not be kept, if you re-define your character and go into another class tree.

I’ve made a mistake can I go back?

Yes you can, but if you do you will not gain the class promotion once again, this is to prevent abuse.
This can be done at your race Hero, going to see this NPC allows you to “Re-define” your class; this costs RF Online Gold with the cost increasing each time it takes place. Originally costing 1000RF Online Gold pieces, it then adds a 0 each time.

Re-definition will not cause your character to be "gimped" in anyway after doing so, no matter what class you have re-defined from, it gives you a clean slate resetting your character to the original class you were.

1,000RF Online Gold – 1st Re-Definition
10,000RF Online Gold – 2nd Re-Definition
100,000RF Online Gold – 3rd Re-Definition
After a 3rd class re-definition the price will remain at 100,000 RF Online Gold per re-define.