Slow burn or grinding. There's maybe 5 games that the plot is good enough that I would consider reading/playing without the XXX aspect to it... and if it's slow paced or grindy, I may as well just play a non-ero game.
I wasn't hooked at first either. I have over 1,000 hours into TitanQuest. The storyline is more captivating for me as I have always been into Greek mythology. Once I got past Grim Dawn's lackluster storyline, the gameplay really kept me going. If TQ stepped up their gameplay, I would go back...
Venomous (Milky Donats Games) - if I could grow a Mandingo sized cock just by getting bitten there by a snake I'd be googling exotic animals in my area. I don't even remember there being any sexual content in the game, just the premise made me want to play it.