I suppose if its an offline game, it would save the character in the computer, if that's the case, all it takes is someone to decrypt the way the save file is saved and you have a Character editor, edit your char, make urself level 9999, go online, be god
if it saves the character online, then whats the point playing offline if you still need to be online to get the player, also if your playing offline, means you can bot like you want and no one would catch you...
Offline<->Online System = fail in every sense