I'm going to limit myself to deception (with a sexual motive) or
intentional corruption / behavioral modification. So for example, I won't count GGGB where some characters are just bad influences. And I won't count F/F rape unless it has an intention to corrupt/train.
Star Knightess Aura - the whole corruption aspect is based around MC's frenemy brainwashing her IRL and psychically taunting her / egging her on in the fantasy world.
Alansya Chronicles - MC's
twin sister deceives/corrupts her.
Overwhored - Tower Mistress coordinates MC's mind-slaves. It's borderline because she's not the one who mind-controlled them in the first place. Plus iirc more instances of brainwashed heroines helping brainwash others.
Slugs & Bugs Conversion - MC is an alien overlord with monstrous female helpers that help corrupt the female human captives.
Crimson Veil - I haven't played much of it but it clearly has quite a bit of F/F corruption and deception.
Nano-Control - at least one instance of a mind-controlled character helping mind-control another.
Harem - As above.
Third Crisis - F/F mind-control is part of the plot.
Nex(e)us Institute - haven't played this at all but it's clearly about F/F mind-control.
News Desk -
Emily manipulating and corrupting Tiffany as well as a bit of this in the
mom/daughter scenes.
Soldier's Life: A couple of female characters help train and degrade the antagonist.
Mistress vs. Slave - Non-con lezdom with a slave-trainer flavor.
iNSight of you - Esther helps corrupt other girls, though it's generally detached.
Maya and Melissa help train Gloria, and it's
much more hands-on.
BMO TV - The whole game is based around deceiving and bimbofying the other constestants. Same for
Bimbo House.
Ruin Me - Consensual trainer. Can be F/F, MC's gender/sex is selectable.
Tyrant Quest - MC has a couple of devious sidekicks that help him.
Accidental Mind - MC acquires mind-control superpowers and eventually his
BFF becomes his sidekick/partner/FWB.