selfish

Holding one's own self-interest as the standard for decision making.

“We all have both a selfish separate self, and an Inner Being that is One with the Universal Spirit. In this sense, every human has a sort of ‘split personality’. We are all kind of what you call ‘schitzy’ with these two sides, these two people living within us. And they are in total opposition. The free will dictates which of these two sides will have its way in our life, at every given moment.”

Having excessive or exclusive regard and concern for one's own well-being, profit or pleasure, with little or no consideration for others.

Take warning by my fate, and shun that flowery and bewitching path; for in its labyrinths the good, the gentle, the kind-hearted, and the benevolent, are too often lost; while the sordid and the selfish scarcely so much as run a hazard.

The most rapid and most seductive transition in all human nature is that which attends the palliation of a ravenous appetite. […] Can those harmless but refined fellow-diners be the selfish cads whose gluttony and personal appearance so raised your contemptuous wrath on your arrival?

Of video game characters: relying on their own actions and capabilities to be effective in the game, rather than on other characters.

With that said, there is a perk to Xiao being a selfish DPS. He plays like Razor where he needs to be out in the field more than 90 percent of the time. Compared to Diluc, Xiao is more independent when it comes to dealing damage.

Related to or equivalent to a selfish gene; best understood as existing to preserve and replicate itself in competition with other entities at the same level of existence, rather than at the level of the individual or population containing

Discoveries of selfish genetic elements often follow from the emergence of a selfish phenotype either in a cross between members of closely related species, or in crosses involving individuals from different isolated populations within a species.

Through this hypothesized mechanism, a selfish virus would reduce the probability that other co-infecting genotypes contribute the expected share of their genes to the progeny.