Vae Victis is one of the best porn games that I've played and I've probably played thousands of them.
This is what I like about the game:
1. The MC is a warlord who focuses on conquering a distinctly different territory in each update. The conquest of that territory could essentially be a game on its own as it consists of a series of objectives and and meeting and fucking various girls on the way to achieving the goal of conquering the territory. Although each update has the similar objective of conquering a new territory, it does not feel repetitive or boring because they are all very different from each in terms of the type of quests, the cultures, the girls, the steps that the MC can take to get there, etc.
2. There are many different girls in this game and I find the vast majority of them to be very attractive, but they are also all different from each other. There are many different body types, ages, races (real and fantasy), etc. and each girl has a unique backstory and personality, which makes the story more interesting and fucking her more satisfying.
3. The MC is unapologetically an asshole and the general slant of the game is towards him raping women in the territories that he conquers. This is not forced on the player though. I like having the freedom to be as nice or as awful as I want to the girls in the game. That is one of the major reasons why I like the game. I've played the game several times and on each playthrough I try different variations in terms of how I treat the girls, which makes it have better replay value than other games where there are fewer choices.
4. I also like that there are usually many different options available in terms of how to fuck the girls. Anal, oral, and vaginal are usually available, which is nice because I can choose whichever ones I want with each girl and do not need to limit myself in what I can pick.
Those are the reasons that I like the game. There are a few negative aspects to it, but in my opinion the positives outweigh these, which is why I still gave it a 5 star review.
1. There are both visual novel and strategy modes. While I enjoy having the option to play one or the other, the strategy version doesn't really seem to add much to the game. It creates extra work by having the player decide which buildings his subjects should construct, fending off raiding parties, and so forth, but I haven't seen plot-advancing or sexual events that result from these features which make them seem irrelevant to the gameplay.
2. The MC often has the option to get girls pregnant. I very much like this feature and it is a key aspect of why I like this game, but there doesn't seem to be any follow-through on this so far. I mean, the girls get pregnant and disappear to have birth, and it is announced that they gave birth but then we never get to see the babies afterwards or see the births themselves. I think it would be far more interesting if we could watch the raped girls give birth and then have some involvement in raising our offspring afterwards.
3. The combat system is boring and tedious. There is a "chicken button," which allows skipping the combat entirely. I use that button every time and I appreciate having it there, but I think it would be great if the combat system were less boring by being more interactive or something.
4. I like the sex scenes in the dungeon, but I think it would make more sense if the repeatable later sex scenes were more different than the initial ones since the girls would probably react differently after the MC has already raped them before.