Overgrown: Genesis is a confused title. As an action RPGM game, it's pretty good! The story and writing are excellent, the art is above average. Sound is repetitive but it gets the job done. If you take away all of the adult aspects here, this is a very solid, albeit it predictable, zombie/apocalypse RPGM game.
However, the problems for me lie with the "adult" (porn) aspects to this game. To me, they feel like an after thought. You, as Juno, the busty pink-haired protagonist, never fuck for pleasure. Your only sex with fellow humans comes from exploitation or rape. In the apocalypse setting of this game, it makes sense that those things would happen, yes, but it gets tiresome. The only other sexual content comes again, from more rape, but from zombies or boss monsters. Neither of these things are enjoyable in the slightest to me, and honestly, it just felt uncomfortable and annoying, as I knew if I was seeing an H-scene, it was most likely to be followed by an instant Game Over screen.
This game is simply confused. It starts out strong in the first area where it makes sense for Juno to suck someone's cock for forged documents. You don't get this option again until you connect with the military later, but by that point it just, again, feels really forced and not even necessary. But the sex stuff feels added in past this point, taking a huge backseat the main story line and plot. However if I wanted zombie story lines, I'd play Resident Evil. The real reason I'm playing this game is to see Juno whoring herself out to survive because she has no other choice.
All in all, this game is just OK. It's not a game you'll be able to cum to, and it's not satisfying enough to replay it once it's beaten. I got one ending and after the cheap final boss and ultra-tedious "dark" rooms, I'm just over it.