Holy Knight Arne and the Demonic Curse (Wolves, Pigs, Monkeys, Insects): From those who made Crimson Lotus Pure Flame, which was quite good but super limited in beast content, just having wolves and a wolf boss. This game definitely is better in that department with 5 enemies that I feel fit into the beast definition, 2 of them being insects or similar.
This is one of those times where the impregnation mechanics are about as close to perfect as you can get but the game itself is annoying. For the pregnancy mechanics, each time you're raped there's a chance of impregnation which I believe goes up the more cum there already is in you? Either way you then have a few stages of pregnancy over the course of 5-ish minutes before birth. After 1 birth you have the option to play a different animation where the MC is raped in a different way to prevent pregnancy. Beyond that there's only 1 vaginal sex scene for each enemy, with a uterus x-ray view during it, which is something I do love. There's very little I'd change for the sex stuff beyond having more animations for each enemy, maybe like 3 for some different positions (doggystyle, mating press, and another that's unique for each?)
Outside the reminiscence room, you have to get raped repeatedly for like an hour to get corrupted enough for impregnation to be enabled. The platforming is meh, and although this will be improved in the future, the current translation's a bit rough. This brings things down a bit, unfortunately, but in the end the gameplay's not a major factor in the tierlist unless it's absolutely unplayable. The new variety in beast enemies boosts this game up 10 points from Pure Flame to land at a 90/100 from me. Hope they do more stuff like this in the future, especially focused on bestiality.