Mmorpg On Mac?

hi guys
i would like to ask if there is any way to play windows mmorpg such as

Lineage 2
Ragnarok
and etc.... without using bootcamp??? because i've heard that you can actually convert windows game to mac? is this true???

thank you very much
sorry if i am a noob coz i just converted from windows to mac and i am loving it!

i have ran WoW on my macbook in the passed, but i was recently introduced to Crossover which is a program taht allows you to install and play games that you normally couldnt on a mac, you can DL it every 30 days from what i know, since it has a trial useage.

http://www.codeweavers.com/products/