-SamanthaSnow's Occupational Hazards. A classic furry SF game about a courier making deliveries. Choices matter. Flash-based. Some avoidable dub-con. Has nice lewd illustrations, but primarily text based.
-Mythos' Fool's Quest. Mostly light-hearted text-based adventure game about a fool corrupting a princess. Some dub-con and references to non-con. Last I checked, Fool's Quest was complete, and the dev is now working on a second game I haven't gottten around to playing yet, called the Fay Path.
-LorenIpsun's Hill House. The OG text-based transformation game. Explore a creepy mansion, get altered in different ways.
-Silver Bard's Nightgames. A very lewd, text-based, turn-based fighting game in a college setting. Surprisingly light-hearted, but not silly. Good sex combat.
-Strive4Power's Strive for Power and Strive for Power 2 (aka Strive; Conquest). Lewd slave-trading RPGs. Surprisingly wholesome. Some dub-con inherent in the premise; avoidable non-con. The lovey-dovey routes are best in my opinion.
-Sherlocho's Imperial (aka Fort Imperial). Furry fantasy guard life sim. Text-based. Some dub-con, avoidable non-con. Has a cute writing style.
-Majalis' Tales of Androgyny. Fantasy futas and androgynes. Some dub-con and corruption, but generally light-hearted. Text-based but with high-quality animated illustrations.
-FreeCitiesDev's Free Cities. A big text-based management sim and trainer game about running an arcology and trading slaves in a climate-ravaged post-industrial hellscape. The management aspects are superb and the world building is top notch, although the writing is a bit creepy and uncomfortably Randian/Bateman-esque. Kinda reminiscent of the old Selectacorp series, but with more accessible gameplay.
-darkofoc's Fort of Chains. A big text-based fantasy adventure game with slave-trading elements. Not primarily a slave training game despite the title. Rather, more about running a party of mercenaries and dispatching them on various lewd quests. Seems to be abandoned now, but has substantial content. The writing style reminds me a bit of XXXivilization.
-waferborn's Welcome to Puttsdale. Light-hearted text-based open-world adventure game focused on spanking. Some very mild dub-con related to spanking. I'd also recommend the dev's Xmas game, a collaboration with Fapfapfap. Check their itch page for details.
-NoodleJacuzzi's Anomaly Vault. A unique text-based game about lewd artifacts. Some dub-con relating to hypnosis, if I remember correctly. Contains some photos//illustrations, but is primarily text-based.
-KanashiiPanda's The Book of Lust. A lewd adventure in a furry college town. Mostly light-hearted, but some heavier themes. Some dub-con. Mostly text-based, but has high-quality illustrations for the sex scenes.
-CleoCraft's Villain. Old school adventure game with a gamut of rare fetishes and a strangely chipper, cartoonish tone. It's not for everyone, but I'm a big fan. Some dub-con, mostly related to transforming captives against their will.
-Dahakma's I Was Enslaved by an Evil Witch and Turned into Her Maid! Charming feminization game. Soft/affectionate femdom.
-Outsider Artisan's Succubus Stories. Cute, lewd open-world RPG about being a succubus. Generally light-hearted, but some dark undertones.
-DPMaker's Queen's Brothel. Surprisingly light-hearted and silly RPG about operating a brothel in a fantasy world. All consensual.
-CarolineTheWoof's Linda Wright: Warrior of the North Wood. A fantasy furry RPG with VN elements. Some dub-con/non-con after losing battles, but still light-hearted somehow. Good character art. It's cute. A bit short, but still worth a look.
-Meandraco's Teraurge. The OG hard xenophilic RPG. Generally light-hearted, but some dark themes. Perpetually unfinished.
-LapisAzurai/BlueWind's games. Well written text-based games with female protagonists and bdsm content. It's been a while since I played them, but I remember them being good.
-Pixeltrickery's A House of Many Doors. This one is an odd pick. Is it lewd? Not exactly, though there is romance. Is it light-hearted? Kind of--some themes/stories are quite silly, others haunting. The gameplay is mechanically similar to Sunless Sea. Mildly NSFW, but not lewd.
-Chandler Groover's Midnight Swordfight. Another odd pick. High-quality interactive fiction with some adult themes. Mildly NSFW, but not lewd.
-dextersinister's Escape the Citizen Factory. A lewd, text-based adventure game about freedom-fighters escaping a dystopian facility that transforms people into different types of sex dolls. (Kind of similar to GlossandGlamour's Lost in Laminate, another classic). Also, one of your comrades is secretly a traitor working for the enemy. Despite the premise, this is a silly, light-hearted game. Some dub-con is inherent in the setting. All the dev's games are quirky and interesting. I'd also highly recommend Boobjitsu Matriarch and The Pixiespawn Festival.
-Gardamuse's Cowgirl Dairy Farm. A text-based management game about running a human dairy farm. Kind of reminiscent of the lactation content in Free Cities, but with a much lighter, sillier tone. Features some dub-con relating to hypnosis.
-Various games focused on magical corruption/transformation themes, that feature both text and either real porn images or CGs. Some highlights: Sunfall's Friends of Mine, Stone Flower's Routes of Life, January Night's Enchanted, Westane's The Company, daviezwei's Fanucci's Amazing Pizza!, G28Here's College Daze: Follow the Lights, midsan's Underneath the Labyrinth, cmacleod42's A Spell for All, and especially sanjafeth's Psychic Private Eye.
-Various "Girl Life"-style games that feature both text and real porn images. MilkyNail's Young Maria is a good example.