In any story across any kind of medium, we're accustomed to seeing things from the hero's point of view - generally speaking, that's just how narratives are best told.
In video games, we often have no choice but to play as the good guys (even if, a lot of the time, "good" actually means "brutally murders a lot of henchmen who probably had wives and kids"), and we're consistently rewarded for playing by the rules, making virtuous choices, and, well, just being a stand-up kind of gamer!
But some games do things differently. Some games not only offer you the choice to be evil, but they actually encourage you to go down that route, dishing out rewards left, right, and centre as a result of your dastardly deeds.
It's often the case that the whole point of these games is to be as evil as you possibly can, but sometimes, it's a moral choice. In those cases, being bad is almost always the more fun, satisfying option - because ultimately, being a goody two-shoes simply isn't as exciting as unleashing your inner villain.
10. Oddworld: Abe's Exoddus
Kooky PS1 platformer Oddworld: Abe's Exoddus tries to get you to play nice, with the main thrust of the game revolving around protagonist Abe's mission to save his fellow Mudokons from a grisly fate.
There are hundreds of the creatures to rescue throughout the story, and while you could go out of your way to save them and unlock the game's good ending, you actually get a much cooler reward if you decide to be a bit more murderous.
If you successfully kill all the Mudokons in the game, you'll be greeted with a message congratulating you on a job well done, praising your lethal efforts. The message also informs you that you are now "bulletproof", before sending you back to the FeeCo section of the game and letting you play through the whole thing again.
And that mention of "bulletproof" isn't an exaggeration, either - Abe is now impossible to kill. In other words, the game rewards your murder spree by effectively giving you an invincibility cheat, so don't feel too bad if your initial playthrough is an absolute Mudokon bloodbath.