I'd like to start off by recommending
against Roundscape at the moment. It's not a bad game, but the skills are all kinds of scuffed (some don't do what they say; some weren't programmed properly; some are just randomly OP) and the devs are going to overhaul the skill system for the next (final?) update. I don't have particularly high hopes, but at least that means modders will be able to fix the skills without having to worry about their work randomly becoming obsolete. No one knows when th
For some game recommendations:
The Whore Quest of Yuna - The gameplay is solid and you learn skills by mastering outfits. If you're a fan of corruption then there's porn for you too.
Pokemon Ecchi Version - It's a somewhat non-linear Pokemon game. Enemies tend to scale to your level and you can run around naked from the start. Running around naked also causes higher level pokemon to spawn including alphas which are basically mini-bosses. There's plenty of content, though still a good chunk of development left. The update schedule is "when it's ready."
Jumble Strikers - You
did say no restrictions on kinks. I like how you can balance using rescue moves vs just trying to kill enemies who are binding your allies. This is also one of the few games where the characters get debuffed if they get raped too much (no corruption here!) and their offspring actually
do something. A virgin run can actually be a bit of a challenge. There are some humorous moments in the game which really help sell the idea that the dev was actually trying to make a good
game.
Knight of Erin - It's cute. There's also an anime.