Edit: I completed more routes with updated info, which makes me even less hopeful for this "game". Which results in the rating being decreased to 2 from original 3 at the time, but let my words describe on what the game really is.
Well, to be honest I never expected to see a indirect sequel to a game that...let's be honest, wasn't particularly great, but at very least was either decent at best or indecisive at worst, and this game, thankfully improves on said faults...but not all of them, and this is what I am going to address on top of what I experienced in this game. Hopefully for the best.
Let's start with the game's plot; it starts with our foul-mouthed protagonist who swears like a chimney(and I assume he's just rude rather than swearing in the original)and loves sex above anything else, and his squad bringing glory for his empire while also trying to become free from it, being lucky that he got special powers to brainwash unlucky sods to his will, doing conquest and then overthrowing the ruler, only to discover that there's greater evil than that, like some holy people who only believe in themselves and all-consuming demons that look like ctuluhu abominations in their "true" forms, and then once you beat them all with the sacrifice of your friend, happy end, followed by marriage if you have enough relations with character in question. And that was just the law route. Then you have chaos route, where the protagonist finally embraces being a jerk but still in the right and being able to save his girlfriend as co-ruler of the world(excluding the secret route where your girlfriend survives without dark powers, happy end), where you end up fighting the fallen angel that has an attachment to a holy mech that wants to erase all life, and even harder than the other route due to much, much nastier enemies overall. And you end up with 2 sadistic choices; you either turn your dark lords into abominations in order to open a dimensional door for some reason, or sacrifice the people and fight uncorrupted dark lords because they want to keep them alive despite being obeying morons to our "hero" otherwise. And that's not mentioning time travel elements for some reason, future/modern tech in medieval fantasy world and such that makes the story less believable and taken seriously. Overall, the story is fairly mediocre and predictable, but at very least not as stereotypical as previous game, since regardless of path you choose(law/chaos), you still end up the better choice in the end while the villains are just nothing compared to you.
Now the best part, the gameplay - let's be honest, in first game you just need 1-3 or so squads with excellent null abilities and stats and you pretty much unkillable, and treasure hunt is pretty much outright bonkers due to fact you can attain really good equipment day 1 is you try that, now it's on more balanced scale, meaning while you can't get that broken levels, you now need bounty hunter in the mix due to ore requirement, but obviously the game won't give high tier equipment/ore that easily till you reach late-game, but those abilities are nice to have. Well until you play very hard, since it is the difficulty that goes up to eleven by having every character have an equipped item, some battles having enemies with fool's lie 4 on items alone! And that's before the player gets access to said items, much much later in the game on thanatos setting which is just very hard but with even higher levels and nothing else. I almost lost the game on very hard difficulty, because of fact it replaces mid-late game units at later stages of the game with post-game ones, that makes the otherwise advanced feeling of very hard suddenly turn into nightmare that pummels your score and with only 12 squads during sortie fights with super strong enemies, you'll be in pain unless you play on hard first but hard is much easier overall even on berserk settings(which just make enemies stronger level wise)unless you set it higher than your team.
But enough of comparisons, you now have 3 squads to manage per battle instead of one, with new abilities, units and instead of building structures that can be captured by the enemy, they are static and you upgrade infrastructure instead, which is much better compared to previous game for rather obvious reasons. And the mechanic in order to get their events no longer requires corrupting/mingling them, you instead get events that decide whenever you'll get them or not, and that's a much better system that fixes the previous faults.
Just like the first game, higher difficulties reward with unlocks and expanded story, which isn't a bad thing per se, but since they mostly just involve stronger enemies with equipment and not things that actually make the game harder but more rewarding, it makes them mostly irrelevant aside from very hard difficulty itself, which gives 10 law and 10 chaos points, which allow you to get the ending you want easier and get higher tier crafting materials for strong units.
Managing units and especially restructuring teams however, is a nightmare since you have a lot of units that are outright unusable due to better variants of them existing later on, thankfully the internal affairs helps with that somewhat allowing you to recoup resources, but not the fact you have a unit that is pretty much outdone one way or another with other units with same growth but much greater abilities. Basically similar issues as first game, but somewhat mitigated by new features. Overall, the gameplay is solid, expect when it comes to grinding aspect for higher difficulties.
The design aspect, if you include modern era bunny suits in medieval world, hero category involving a character that has "deal with it glasses" and "i like the cut of your jib" quote if you alter him, as well other nonsense the game has to offer, like barely dressed female fighters that are somehow kept alive by magic despite taking obvious wounds to their unprotected spots and "all-ages" version doing nothing about it, essentially making a feature to appeal to others meaningless. While I am not in that category, if you are going to make a game that appeals to everyone, you have not only to tone down the sexual designs themselves and the fact tentacles mention assaulting women anyway, but also the chimney swearing protagonist who is unchanged in that version as well. And that's not mentioning Kickstarter backer rewards that all involve making characters younger as their alternate forms, all have 1 sex scene and then never mentioned again in the plot, let alone being kept in your party despite losing/weakening actual characters they are based on, but gameplay wise, all of them are very, very powerful, and even if you get late-game units with power comparable to them, they are still the strongest options based on what they focus on, like the fairy dragon being able to endlessly extend battles by stacking strat support to point you can literally spam it, and the fact it's the earliest character with surround null, until you get said option for the dog girl that is. Not to mention their leader links only focus on the protagonist even if they are better off with other teams based on their type and abilities, not their base characters, further meaning they are self inserts meant to love our "hero". All that makes options to corrupt heroines pretty much not good for first play-trough. Well expect certain ones that do have chaos options and those alternative forms. And like previous game, it still pretty much demands careful choice management/picks if you want to get everything the game has to offer, including alternative forms, character titles and special events.
The writing part, if you count the story itself, well not so great I am afraid - same issues as predecessor game, just less stereotypical, convenient means to get sex, convenient superpowers, lucky calls both from "heroes" and villains, this is not my final forms, an "hero" who is a huge jerk to pretty much everyone, but he's still in the right, even despite the tragic backstory, unsympathetic characters and nonbeliveable "love", funny elements that are more on cringe part, "pleb" and other american dialect that feels off. Happy end, one way or another, no ending that could be seen as an overlook on what happened while sides having good points on why they do that, like saving their kind or well intentions. Can't have hard feelings for something that I will forget very quickly nor give good lessons. The only character that I can sympathize with is the dog girl, because everyone treats her like garbage and a toy, yet never invoked negative feelings aside from design that could be done slightly better.
The sex scenes, well they are done fairly well on other hand, but if you count the story and the writing, they make the emotional element of them pretty much nonexistent, regardless if its a victim, or the character actually asked for it. Appealing if you have fetishes, for me that feel empty, especially with the protagonist who loves nothing more than sex because its all convenient for him. And swearing left and right, as if he thinks he's a badass, but to me he's a unlikable prick and a designated hero, even in path where he reserves most of the sex for love. Even others can only feel jealousy on how lucky to have powers like these and get away with it. There's a fair amount of characters who are jerks with good intentions, but the protagonist is not one of them.
And there's some bugs and oversights; lowercase letters during dragon singer story parts, one catgirl mage event not giving alignment points properly aside from law option, Unicode descriptions on certain units, characters not having naked versions of their sprites from previous game, and some more I overlooked. Overall, nothing too bad, but fairly annoying on quality control. And certain untranslated minor character names during one of chaos route events where you end up turning the girls into abominations in order to proceed.
Soundtrack is better than the first game, which is good, but it still feels generic, and feels like a RPGMaker game, and some of the tracks feel that way. However, it really gets on dissonant side when you get to time traveler events, where a English voice acted music plays for supposedly heroic moment, yet it never fits neither with the situation you are in, nor in combats you are going to see. Forgettable, I could say. But at very least not bad.
So what I could say about this game overall? A improvement but a disappointing in one. You have improved gameplay and design of UI and other features, as well act of sex for some, but the story has barely improved, same tricks, same elements, same lucky lottery, abuse of negative colors that feel unnatural, unfunny attempts at humor, and many other things, but I can say for sure, if you want sex, you can go for it, but if you expect a story that can be remembered and inspected, you are in the wrong place. I didn't have much hope since the first game, and it still managed to disappoint me in that regard, especially when everyone's is either a moron, jerkass, or incomprehensible god of all things. The gameplay is something that you can forgive for, but not when it comes to playing it over and over again for days, not to mention compared to sandbox games, it doesn't compare well in that case.
Is this game really bad? No, it does have "some" value, if you ignore the rather edgy and predictable plot with heroines who are for the "hero" one way or another, and even if he's nasty, like the previous game main character Loki(who is also part of loot box system in form of keys of destiny, which in turn requires stacking treasure hunt and hoping you got units that you cannot recruit yet, because of fact it pools from unit's base costs/tactica required to unlock them, and its bugged if you get all units with truth/ruin tactica from chaos route, since you can't use it anymore once you get all non-hidden units even if they require extra tactica, like 3 chaos route seraph elites that get multiplied on very hard setting ), who's always in the right, whenever he murders citizens, being a huge arrogant jerkass who swears while thinking he's a badass, turns heroines into slaves, or sexually harasses them during rest. And villains are still nothing compared to you, especially minor characters who are not women that don't even get mentioned during mid-late game, like dragon commander named Mason, who while the females and our "hero" fight, he's like, nowhere to be heard aside from fact he's in your party, and only gets mentioned in the law ending. Which is opposite of male sidekick from previous game, who despite not being memorable, at least gave some reason to believe that the writing and the plot isn't detail-less. Basically all women get events especially sexual ones, while males get nothing, unless they are our "hero", or genderbent like the priest in the first peacekeeping event.