instrumental rationality
using reason as a means to achieve an end
utilitarianism on simulated killing
kantian deontological ethics on simulated killing - moral agents
kantian deontological ethics on simulated killing - formulation of categorical imperative
virtue ethics on simulated killing
aristotle assesses the morality of simulated killing not in term s of whether the action itself is right or wrong but how it affects the character of the person doing it
virtue ethics on simulated killing - development of character
So the cumulative effect of playing games which involve simulated killing may lead to the development of character traits that are not virtuous, such as injustice and unkindness, or at least inhibit the development of character traits that are virtuous, such as justice and kindness. Simulated killing is wrong if it prevents the development of virtue, and so prevents the gamer from achieving eudaimonia.