Mesmo um simples ajuste do diálogo dos NPCs e das linhas de missão seria um ótimo começo. Seria possível obter muita adaptabilidade sem consumir novos recursos artísticos - os MMORPGs já são concebidos para reutilizar muitos recursos artísticos.
Discussion
Ultima Online resources were originally finite but players hoarded everything and commerce siezed until they patched to be inflationary because characters had no upkeep costs.
NPCs treated characters differently, and would offer quests or not, based on their morality rating. It quickly dwelved into PvP combat