looking for browser RPG game script

hello friends, I'm wanting to make a browser game, in the past I had a nulled script but I lost it and the project is still in me, it can be a simple model or more elaborate like
battleknight.gameforge.com and bitefight.gameforge.com
or one that exists from Mafia, but I don't know how to look I'm a few days looking for someone who knows how to give me a light?