Great Greed is a decent monochromatic Game Boy RPG released in 1992 where everyone and everything has a food-related name.
Throughout the game you encounter several NPC's that help you out: a couple of guys, an old woman, but the rest of them are the King's daughters.
After beating the game, you are given the choice of marrying one of the daughters. But just for fun, I tried saying "Yes" to one of the guys (hilariously named Lunch Box and Lunch Break), expecting the usual JRPG "yes/no" questions in which the game forces you to pick an answer or else the conversation doesn't continue... but I was surprised to realize that you can totally say yes to marrying them... and the rest of ending reflects that option! It's hard to see due to the minuscule sprites, but the text says it all.
Pedophilia? One of the king's daughter is 11 years old... and you can certainly marry her too:
But wait, there's more. You can even marry the Queen and the King:
And of course, since you can marry the King himself, then you can also marry the old woman and one of the daughters who's already married to someone else. This game is sick sick sick and got away with it!
There's a point in the game where Microwave (the old woman) says she'll kill you if you don't do what she says, and if you don't, she follows through and kills you (and then says 'just kidding' and says she didn't really kill you), there's a point where you have to counter-rig a rigged election, there'a a haunted record factory, there's literal garbage everywhere to gum up your item slots (and you have to pay to have someone throw it away for you), there's a point where you have to eat a hot pepper that drains your life in order to run fast enough to get through a certain part of the game...
KMFDM : THE ULTIMATE SOUND AND A MESSAGE FROM SATAN IF YOU TURN IT AROUND