Megalomaniacs are evildoers that are pathological egotists who are obsessed with power and are similar to Dark Lords and Evil Rulers in that they seek to dominate everything but are more concerned with power than actual conquest: despite having the word maniac in the name, it does not mean they are always clinically insane. However, a Megalomaniac will often commit outrageous acts of extortion to obtain said power such as hold cities/residents for ransom, kidnap presidents, attempt murdering the protagonists, finding forms of energy to use to their advantage and advances (given the opportunity), etc. All in order to demand outrageous claims of power.

Their heroic counterparts can be rare or just as common as these megalomaniacs.