Earth Girls thinks it's clever. The whole setup, NASA pinging deep space and getting a reply that's basically "we're here, let's fuck our way to planetary domination," is the kind of premise that makes you snort beer out your nose. You're some random student, Earth's chosen champion, and the win condition is converting more women to your side than the alien competition. Not saving the world through combat. Through your dick. It's a stat builder and dating sim mashed together with a harem wrapper, and the game knows exactly how stupid that is.

The character models have that glossy 3DCG look where everyone's skin is slightly too reflective, like they've been oiled up for a bodybuilding competition. The alien girl, she's got the whole monster girl thing going on, weird skin tone, antenna or horns or whatever, but the tits are massive. Of course they are. There's a school setting because where else would you run a conversion campaign. You bounce between classes and trying to finger some paranormal entity in the bathroom while your classmates remain blissfully unaware. Voyeurism pops up in weird places. I walked in on two girls going at it in the library stacks and just... stood there. The game didn't stop me. The humor lands about half the time, which is better than most porn games manage. One dialogue tree had me explaining human mating rituals to the alien while she critiqued my technique. I laughed. Then I had to do a handjob minigame that felt like it was designed by someone who's never seen a hand.

The stat building is where things get muddy. You're supposed to balance charisma and something else, I forget what, to unlock different conversion paths. But the game never really explains why you'd pick one over the other. I maxed out charm early and suddenly every girl in the school wanted to sit on my face. Which, fine, that's the fantasy. But it made the whole "contest" feel pointless. The aliens were supposedly converting women too but I never saw evidence of it. Just my growing harem and a vague sense that somewhere, someone was losing. The lesbian content is there, mostly as background flavor or threesome setups, and it's fine. The oral sex scenes are where the animation actually tries, lots of tongue detail and those wet sounds that are either hot or gross depending on your mood.