It is a lot easier to be ‘evil’ or at least amoral in a game that does not play as a giant power trip for the player by making them fairly easy to become absurdly OP.

For example, play Kenshi.

You don’t have to be ‘evil’, but chances are, going out of your way to be ‘good’ all of the time will get you scammed, enslaved, starved to death or killed.

In many video games, being good vs evil is a relatively costless, relatively cosmetic decision.

It usually takes either an extremely harsh world, or very good storytelling to make such decisions more meaningful, where pragmatism and the innate messiness of reality factor in more greatly, to make such decisions more meaningful.