NTR by far breaks a game for me... The messed up stereotypical kind (the real one) a lot of people here seem to think NTR means any girl having sex with any male that isnt the protagonist... which is dumb...
Basically if your trying to seduce your family in the game, and the couple next door have sex, people scream "NTR ! how dare her husband bang the milf next door!!" I for one dont care, let the milf next door have her fun, we might get our turn eventually ! Same goes if mom dates before we seduce her, or sister already has an established boyfriend...
To me Eric from BB wasnt hate-able because he was banging Ann(mom) I moved past that as I knew eventually the MC was gonna get her (if the game hadnt been abandoned, Thank you mods for filling in the blanks !!) He was hate-able because even if you extended an olive branch to his punk ass, the very next week the dude is trying to get your mom to ship you to Military School so that he could have his way with your sisters as well, and try to con your family out of your own home... **** him sideways !! so I only saw Eric as a NTR attempt on Alice and Lisa since Ann didnt belong to us in the first place (he stole nothing)
For real NTR that ticks me off, look at Girlfriends Amnesia, and the character Adrian, I hated that mofo form the start, he had his shot at the main girl, was a rapey creep and lost his chance, yet the writing in the game places him as her doctor's assistant so he can molest main girl in elevator, later on (through bad choices, kudos to author for making it a choice for cucks only) he can slam the hell out of main girl infuriating the player !! Lastly the endings in the game, the main ending isnt happy, its bitter-sweet and melancholic, the twin sister ending is kinda messed up but happy, and has an awesome "in your face" moment", but the NTR ending ?!!? The dude gets rewarded for all his rape and shadyness, his ending has him rich, successful, famous, steals our girl, impregnates her? (might be MC's baby) and the main girl gets cured of the amnesia in his route...
Corruption also gets on my nerves cause very few people can pull it off well, most just make the female main character a filthy slutty piece of human meat that a dog wouldnt want to pee on...So far the only good ones I have played were Coceter Chronicles, and so far A Wife and Mother. In those two games the female MC is slowly corrupting, she is having urges to bang people not her life partner and what not, but she isnt so far at least being blackmailed into it, forced, raped, etc. She chooses who she ****s with !! She is still cheating and becoming a slut, but with people she wants rather than the entire town.