Well, if you play your cards right there are lesbian scenes in Good Girl Gone Bad that I really enjoy. I'm fairly certain you have to be at least a little bad to trigger them though. Regardless this game has the best written female protagonist of all the game's I've played with a female protagonist, including my personal favortie game I Love Daddy. So that's saying something.
I Love Daddy also has plenty of lesbian content. Daughter Mother, Daughter and best friend Cath, Daughter and Cousin Mari, Cath and Mom (ends in threesome with daughter cath and mom), Cath and Mari. Seriously, this is my favorite game, with 10 different endings it has lots of replay value.
In case you don't take Palanto's word for it, Wicked Choices is pretty great. The female heroine and her handmaiden and her aunt, nice scenario.
If you don't mind a little Futa Holy Slaves has some interesting content.
Family Values sets up a world where 99.99% of the male propulation was wiped out by a bioweapon in WWIII, the result is a very liberated sexual culture of mostly women (who after the war had lost 95% of their population) As far as I know the MC is the only male in his small town, and all the girls are fucking one another. Most of the scenes eventually involve you in some way, but there are quite a few lesbian scenes that stand on their own or are happening in tandem to a m/f scene. Also plenty of incest.
Vis Major has a good lesbian scene already, and it has teased more with both that same character and some with a really cute childhood friend that I can't wait to see.
The art in SisterSisterSister is very plastic, but the action isn't bad, and most of the action thus far has been lesbian in nature, in spite of your status as a male MC. You're a voyeur to your older twin sisters fucking one another while they teach you to be the man you want to be and eventually corrupt your own twin sister. Your mother and Aunt also fuck. So yeah, there's plenty to see.
Chloe18 has plenty of lesbian sex between at leaast 3 different girls, Pizza Girl has the most content by far. There's a dominatrix slut who fucks you with a strapon in detention once and there's the nerdy girls who you keep teasing to orgasm while she plays overwatch. There seems to be more action coming, but it's still in development.
Keep an eye out for Blooming Love, it's still in early development and no sex has occurred yet, but the premise is two sisters who ran away from home for their own reasons enter into a romantic relationship. Its a cute story so far, but as I have said, hasn't progressed to any actual action.