Classes are heavily changed in Legacy of Darkness, I based my class system on the 2nd Edition (the one I played first). Of course I do not take this part to the word, in fact many class will exist like the paladin, the barbarian and the warlock, but no ninja (rogue), dread necromancer (arcanist) or other of those type of class. Due to the very low magic setting the Wizard was moved to prestige class and the cleric become more a holy warrior with blessing abilities (still good, magic was overpowered anyway). The classes will be fewer but more customizable. Based on the 1st and 2nd editions, it will feature many of the base class such assassin. I also use the Single class progression rule. I will keep a 3.5e aspect and include exotic variant class and campaign specific prestige classes.