Well, it depends on how you want to qualify things. "Lightning Warrior Raidy" (both games) for example are almost non-stop lesbian kink, with an occasional heterosexual scene to mix things up.
Outside of porn, one little known title that comes to mind is "Loren: Amazon Princess". Loren herself is a lesbian. There are also romance options for all gender possibilities (man on man, girl on girl, hetero) somewhere in the game. Your character can be either male or female which means the game can have a lesbian relationship in focus if you want there to be. That said there is very little in the way of "action" despite the title being made by Winter Wolves (which focuses on romance graphic novels mostly, their RPGs represent something of a departure from their normal format), this is also why it's made it onto app-based devices and STEAM. It should be noted that a big part of why I mention this is that Loren is actually the hero of the story, although not the protagonist, your character is pretty much a slave/servant sent to assist her during a quest to rescue her mother which leads to her being exiled from the amazon kingdom at least temporarily. Depending on the choices you wind up making, you can wind up in situations where you say visit the elven kingdom in the woods, and the queen pretty much gives Loren a couple of forest nymphs to have sex with as part of her hospitality (which she indulges off screen) nothing particularly graphic or fan service oriented overall there, the point being that Loren pretty much does her thing (more "Conan" style if Conan was a lesbian than anything) whether you try and romance her or not.
That said, outside of porn it seems lesbians get very little attention. I suspect it's mostly political, with the media tending to heavily gravitate towards gay men. The idea seems to be that it gets more attention by upsetting more people, and with a majority of male gamers/viewers/etc... for genere material that same reaction makes it easier to claim it as a 'statement' rather than catering to perverts, since most of the guys viewing like watching girls make out to begin with. This has the ironic effect of meaning that lesbian relationships in the context of heroic fantasy tend to mostly be relegated to porn, at least in the west.
That said as a big defender of mature content in games (both sexual and violent) I think people are pushing things too hard on the sex/relationship front a bit too hard, given that I do not think everything needs to have sex or romance options in it, and in some cases it detracts from the product itself. "Saints Row 4" had a fairly clever parody of this. What's more when you shoehorn in romantic relationships, it brings politics with it (gay/lesbian representation!) and then the next thing you know you've got a giant mess attached to your product. It works in some cases, not in others, and really I don't think anyone should set out with the stated purpose of say "having more lesbians in games", but rather setting out to make games and then having lesbians in it if it works. For that matter I'm not a big fan of forced gender representation either, for example while I understand WHY they did it, I see no real reason why they should have put "Tauriel" into "The Hobbit" as the entire story worked just fine without needing to toss in a girl and romance subpltot for the sake of having a girl and a romance subplot. Heck, for that matter, just having Legolas running around being awesome (which is also part of selling this) detracted from a plot where the Dwarves should have been doing their own fighting, and truthfylly I expect more than half the problem is Peter Jackson's inability to handle the idea of effective dwarven warriors and direct it properly.... but I'm getting well off subject.
