is there a word for when you want to do a swap AU but like only one half

And you're like well. I'd rather trust myself to the fate of the world than anyone else. And I'd rather not let anyone else suffer the Torment Nexus just because of my own feelings. That seems kinda selfish. Alright sure.

So you enter the Torment Nexus. Each level has you pressing buttons like, [abduct innocent scientists to your vat: chances of humanity's survival increases by 0.005%] [everyone disliked that] [congrats! your moral goodness has decreased!].

The later levels get even worse. [blow up Antarctica: chances of humanity's survival increases by, ummm who knows ????] [total humans negatively affected: ????] [congrats! you're an ecoterrorist!].

Then you reach the final level. It reads: [through this door you'll break the news to your friend that he needs to die.] And you're like, wait he has to die??? I have to tell him?? But that's incredibly fucked up. After I went through the Torment Nexus as well. But it's the last level. So oh well. I can do this I suppose. Rather me than anyone else.

You enter the level and you friend is standing next to a cliff. You go over to him and say, hey this really fucking sucks but I've just learnt you need to jump off the cliff. Then we might be able to save humanity for real though. Maybe billions of people can survive if this works.

there are 1001 one things you can put into the backrooms that are more interesting than monsters

once you have done that, find something else to do with your creative efforts. not everything needs to be suitable for a video game.