Ah yes, CSS. The bane of web-developers everywhere.
Now that sluts will be gone, will there be still girls coming to the dungeon not for fighting, but for sex? I thought that was a nice idea. They might even be willingly enslaved or just come for a one-night stand. I'd like a game about an actual lust-dungeon. This game was quite close to that already.
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Spontaneous ideas:
— Have two types of “slaves”: Lovers and Fuck-Slaves:
Lovers would be the players exclusively
Fuck-Slaves would be for the monsters
Each role gives different buffs to the dungeon, Lovers more personal buffs, Fuck-Slaves more for the monsters.
Each of the girls would maybe also prefer one type of slavery over the other. Slutty girls might want to be Fuck-Slaves, Romantics would rather like to be a Lover.
It could also play into a sort of system. Maybe gain a reputation as a legendary lover, attracting more starstruck heroines, or as a fun fuck-dungeon attracting more slutty girls.
Even your different monsters might attract girls who want to play with them specifically.
— I would think about making the roles of Lover and Slave temporary. The girls leave after some time or you/your monsters become bored with the girl and throw her out. Make one of each permanent by promoting them to mistress or dungeon-manager/head-slave. I don't know a good title for that. That would make the dungeon more dynamic.
— Send your lovers/slaves out of the dungeon on missions, changing dungeon stats or generating resources. They would come back after a while but some might use the opportunity to run away if they don't like you.
— Recurring visits by the same girl(s). Generate them randomly with a (random, but then) fixed set of pictures and have them come back instead of removing them permanently. They could even develop stats and traits over time and visits. A bit like randomized Heroines/Rivals/whatever.
They might have a goal, like beating your dungeon to gain a specific amount of money, freeing a specific slave, asking for some kind of (maybe a magical) favor or becoming your slave or lover for a time.
These might be party leaders. Definitly not every girl should be permanent. Maybe have some ex-lovers or ex-slaves come back for some reason or another. The reason could be depending on treatment. This might allow for some dynamic storytelling in the game.
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I think these things would make it more interesting, without losing the random character of the game. I like games with procedural content, because they feel more replayable and the dev normally puts more time in mechanics. That makes it often a better game in the gameplay sense. They can also produce infinite interessting, random stories. See Rimworld/Dwarf Fortress and others for examples. I love emergent types of games. :-D