Hmmm… yeah, “dating-sim games” is a really good term to use for ren’ai games, indeed. Even why, we have between us many girls who likes to play these games, so they are not just for guys (the ‘bishoujo’-part, i mean).
But as for kishiku or yarugee games, i still think that’s not suitable (because they are not really about ‘dating’ girls). Maybe we can call them something like “sex-slave-sim” or “sex-training-sim”.