You've come to the right Hand. Here's an (incomplete!) selection of unwholesome queer games for all your messy bitch needs:
- First Bite - A fan-fiction writer gets eaten by three gay vampires
- NIGHT/SHADE - Twinks love drugs, crime, and murder in this cyberpunk world
- Ladykiller in a Bind - Pretend to be your (male) twin on a cruise ship and have (gay) sex with his friends and lovers
- Karryn's Prison - Dominate men with either physical or sexual violence as the female warden of an all-male prison
Thank you for the recommendations and a +1 on Ladykiller in a Bind! Here are some of my own. These aren't the sexy kind of unwholesome though, mostly just messy gays (my favorite).
Analogue: A Hate Story - This is one of Christine Love's (same dev behind Ladykiller) earlier games, where you are investigating the logs of a generation ship, trying to piece together what happened to it thousands of years ago when it went missing, while interacting with two very different AIs (who you can date). There is also a sequel!
We Know the Devil - Short VN about 3 queer kids at a religious summer camp. From the description: "it’s about being weird and queer and wrong and hoping against hope no one will find out when the actual, literal devil comes for you." I can't overstate how much I love this game.
Heaven Will Be Mine - Same team as above, but now it's messy queer girls in space.
VA11-Hall-A: Cyberpunk Bartender Action - Play a sapphic bartender in cyberpunk dystopia and interact with a wide variety of clientele. One of the best game soundtracks ever.
I Was a Teenage Exocolonist - Both wholesome and unwholesome queers in this one! Grow up together with a diverse group of kids on a strange planet previously uninhabited by humans. Multiple playthroughs strongly recommended.
Salome's Kiss - While I'm linking this game specifically, ebi-hime writes a lot of VNs and this isn't the only fucked up queer one (also: fucked up het, and fluffy queer ones), though I think this is probably the darkest. From the description: "A lesbian gothic romance tale set in Victorian England, in which an anxious governess is aggressively pursued by her unruly, tempestuous pupil."
Paradise Killer - Investigate a bizarre murder in a digital vaporwave paradise. Some of these characters are murderers, but they are definitely all in a cult, and you can kiss a couple of them.