Eiyuu X Maou

Lord Felser is a Demon Noble in a land where demons co-exist uneasily with humanity. Angered by encroaching humanity, he decides to take over the world to put them in their place. He hits upon the means to do this after defeating and sexually assaulting an attempted intruder, who becomes pregnant and gives birth to powerful demon children.

So he sets out on the trail to conquest, with his cohort and confidant the demoness Lady Liese, first to unite the demon lands under his rule, and then to challenge the powerful Que Kenz Church and the opulent Kingdom of Gikraf. Along the way, he gathers more champions and commanders, and more brood mares to produce his demon spawn in greater numbers and variety.

Eiyuu X Maou (translates roughly to "Hero vs Devil King") is primarily a Turn-Based Strategy with RPG and Dating Sim elements, Visual Novel style storytelling, and H-scenes justified in both gameplay and plot. Though inseminating the known world to amass forces is an important aspect, the gameplay actually stands well enough on its own. The H-scenes, although non-interactive, feature beautiful artwork and full voice-acting (sometimes breathtaking.)

Tropes used in Eiyuu X Maou include:

Absolute Cleavage: Queen Sandrine is held into her dress by a sheer mesh down the front.
Action Girl: Momo, the claw fighter, who introduces herself to Felser by pouncing on him (later becomes a Running Gag.) Also Celes, who comes raiding Felser's territories to confront him personally.
Anti-Villain: Though it doesn't slow down his dog-kicking during the game, in one ending Route Felser uses his victory to bring peace between demons and humans.
Artifact of Doom: In the beginning, Felser has trouble maintaining his own will while wielding his sword in battle. An escaped human slave who steals it, after cleaving a demon in one strike with it, is quickly corrupted into Axe Crazy Evil Laughter, then charred to a husk by it.
Authority Equals Asskicking: Gameplay demands it out of Felser. Played straight at each conquest, where the Boss Battle is with the ruler of the territory, increasing in difficulty with each, more powerful, ruler. Justified by the fact that, according to Felser, demons follow and obey the strongest one.
Bandage Babe: Faora, completely bandage-clad ancient mummy who looks surprisingly well preserved beneath. Not quite the Bandage Mummy trope, as she doesn't seem to have any infirmities underneath.
Big Freaking Sword: Even considering it has its own will and can reject people willing to handle it, Helhart is your average Shining Sword of Justice™. Eibram, its corrupting counterpart, definitely is a Badass Fucking Sword.
Black Magician Girl: Liese is fond of getting directly into the action with her lightning bolts ("Buri-surito!"). This also describes Yukine the snow witch, who uses ice offensively and creates snow to terrorize more southern territories. If Felser teaches Noishisu magic, she becomes the fire version of this.
Body Horror: Felser gets a Winged Angel transformation at certain plot points. But a true love in his backstory gets something far more horrific.
Bokukko: Faora. Also a Dark-Skinned Redhead.
Bonus Boss: Can be unlocked through one of the better endings, and then can be accessed from any ending to add more plot, more experience, and an Infinity+1 Sword. But the conquest is so challenging that every time you die, you're given the option to quit and save your progress for your New Game Plus.
Boobs of Steel: Inverted initially, of the three main girls, Momo the fighter is flat chested while Liese the spellcaster has the largest set. Played straight with the late game addition of Dine, the toughest Soldier and with her special attack has the highest damage potential, who is also the most endowed.
Butt Monkey: Garefu, Felser's old advisor, long time friend and consummate whiner. Felser and Liese both enjoy ripping out his hairs; collecting them to the end of the game unlocks a Plot Coupon.
Calling Your Orgasms: Doesn't any H with voice-acting include the cry of "Iku!"?
Camp Gay: Goeria, a flamboyant pink demon who ends his sentences in an exaggerated archaic honorific and demands his minions call him "Go errrrrrrdia-sama!" When given the task of destruction on the prairies, he prances in the grass, singing. And no, he never becomes an option...I suppose because he can't birth children?
Can't Drop the Hero: Averted. Felser only has to join battle on the few occasions that he's personally attacked. The rest of the time any commander can lead. But since the defeat of Felser means game over, it's in your best interest to get him combat experience to level up competently. Also, some features and Optional Sexual Encounter are only available if Felser leads the attack.
Catgirl: Momo climbs trees, pounces, and fights barehanded with her claws.
Clothing Damage: Whenever Alette transforms, her clothing is completely destroyed. There's also a bit of combat tearing when Liese goes after Celes for a vengeance match.
Charged Attack: Several levels of these, many which are unique per character, some which are strictly damage-dealers and some that have strategic application. Additionally commanders have a group-based special that can do various things such as hit For Massive Damage or buff or heal everyone.
Charge Meter: Increases with successful hits or defends, increases faster if using Tactical Rock-Paper-Scissors effectively.
Combination Attack: Another use of the Charge Meter, to direct multiple characters to strike the same target at once.
Com Mons: Not Mons, but the commanders you can collect, their variety of abilities and special powers, and the way they're employed in play fits the trope exactly.
Creepy Child: Meissiah. She can also bear you a child who takes after her mother in this regard.
- He definitely qualifies even better than his mother. Heck, he is a mindreading warlock, openly eager to slaughter anybody you will designate as an opponent, and his emotionless face twists into delight when he expresses his spite by saying "Father" in a sarcastically respectful way. To the point he makes Felser shudder. And he's a newborn.
Crowning Moment of Awesome: On one route, during the assault on the hovering pyramid-city of Heteth, Faora sends Felser flying in the sky to a several-miles fall. Without hesitating, Alette jumps after him and finally achieves full metamorphosis into her real dragon form.
Crystal Dragon Jesus: The Church of Nenois bears the trappings, rites and hierarchy of the Catholic Church.
Cute Mute: Parushira tries to communicate through nods, headshaking, and interpretive dance, but never makes a sound. When her minions admit that they can't understand her at all is one of the few times she loses her innocently glowing smile.
Dating Sim: Some girls have a hidden affection score that can be increased by positive interactions with Felser, and determine the ending. Though most of the 'dates' are simply breeding sessions, there are a few events that could be called dates, usually featuring some form of rioting villainy.
Defeat Means Friendship: Goes hand in hand with "It's Not Rape If You Enjoyed It". Felser manages to get the loyalty of everyone he conquers and rapes.
Defrosting Ice Queen: Making Yukine blush is the only way to bring color to her cheeks. Felser employs a less-forceful, smooth-talking approach with her that makes her blush a lot.
Deus Sex Machina: Felser's means of making an army. All he needs is a few brave women...terrified ones will work, too...
Dojikko: Noishisu is smaller than the torso of her heavy armor, and sometimes collapses in it or falls out of it. But even when she's wearing nothing more than a string bikini, she can find things to trip or slip on.
Earn Your Happy Ending: The worst ending cuts on a dramatic cliffhanger. But more rewarding endings can be reached by gaining the affection of one of five girls, or all of the above.
Emotionless Girl: Meisshiah, a clerical acolyte, speaks in a soft, steady monotone. The day after her church is invaded and razed by Felser's demons, she's serenely reading a book under a tree outside, and is hardly distracted when Felser himself approaches to question her.
Evil Overlord/Diabolical Mastermind: It's the name of the game for Felser.
Evil Versus Evil: Felser's villainy begins as self-preservation, but the story brings him up against greater and greater Evils.
Fantastic Racism: Many humans and demons hate and/or fear the other. Liese has a particular, and particularly incurable, hatred of humanity, and often indulges her cruel streak on them.
Fire, Ice, Lightning: All Magicians specialize in attacking with one of these three.
Gag Penis: Compared to the 7-inch tall Ninas, every penis is a gag penis, especially Felser's.
Hannibal Lecture: Felser delivers many of these, as Trash Talk or Evil Gloating, though there is some self-righteousness to it. The most crushing lectures go out to Celes, pre and post battle—though it never completely crushes her idealism, she can't quite shut him up.
Hero Antagonist: All of the yuusha characters, though all can be won over to ally with you at some time.
- Meissiah the Church Militant is sent to take revenge for the first church and prevent Felser from taking the main one.
- Celes the The Paragon takes up the cause to bring Felser to justice, in response to civilian suffering from his conquests.
- Otis the Knight Errant appears with his friends Gerard and Irma. In some Routes, he'll verge on Well-Intentioned Extremist, accepting corrupting artifacts to defeat Felser.
He Who Fights Monsters: Otis, in some routes. Also Felser's backstory. But it wasn't fighting monsters, it was discovering that humans could be the bigger monsters.
Humans Are the Real Monsters: The further you go into human territories, the more they reveal their dog-kicking, -shooting ways. This is before Felser's backstory experiences reveal they also feed them to Eldritch Abominations.
100% Completion: Denied! In order to be able to access all areas, you must take a detour that will reduce your ranking for the current conquest. Also, the game released with a bug making 100% item collection impossible, a bug that wasn't fixed until the fourth patch.
Ice Queen: All that keeps Yukine from being a Proper Lady is her reclusiveness and misanthropy. She may have been a Brainy Brunette, but she's gotta have blue hair.
Infinity+1 Sword: The Proof of Satan obtained from the Bonus Boss. Repeat as necessary until all your warriors have one. Unfortunately the Archers and Mages get no such goodies.
Innocent Fanservice Girl: The Nina sisters, tiny dryads, fly everywhere in the nude. Faora never seems to notice when her bandages have slipped until someone reacts to her exposure, and even then takes the reaction with mild amusement. And it never occurred to Momo to wear panties under her tiny miniskirt, and even resists Felser's order to do so "because it's a bother".
Interspecies Romance: Felser is a versatile inseminator with all manner of races, identifiable or not.
Kansai Regional Accent: Faora. I guess a girl thousands of years old would have an accent. Not quite the Idiot, as she fluctuates between airheaded and cunning rather quickly.
Lady of War: Celes, a breast-plated yuusha swordswoman. Also Dine, one of the biggest and most powerful fighters, can go berserk with her spear.
Magikarp Power: Garefu, the old advisor and all-around Buttmonkey. All other commanders join at a minimum to average level of your current roster, but Garefu joins at level 1, vastly outleagued in attack strength and sturdiness, and his specials provide only trivial healing. As he levels up, his Power gain per level is way beyond other characters. He becomes a one-man nuke before he's halfway caught up with the rest, and his mass-healing becomes quite valuable.
Minion with an F In Evil: Some of Felser's most wholehearted supporters don't quite get the hang of evil.
- Momo makes a game out of Destruction, sometimes reducing terror with her playfulness, and at times suffers lingering dejection at the loss of her angelic status and human's love.
- Noishisu's clutzy execution makes a mess of her efforts, for better or worse.
- Dine, while sacking a cathedral, has a breakdown from the realization of how she's fallen into Felser's hands.
My Name Is ???: With the Bonus Boss ascension shadows, and the location name of the final Bonus Boss.
Naughty Tentacles: Felser's cloak is full of numerous belts that can unfurl to grasp, bind or probe. The ends of each strap have smaller, fingerlike tendrils with their own prehensile dexterity.
New Game Plus: At ending, the game can be saved to restart from the beginning with all experience, inventory, commanders and children preserved. The game deals with the discontinuity of having the characters at the beginning by keeping them 'grayed out' of the plot and game triggers, but they can still join battles and bear children.
Noblewoman's Laugh: Queen Sandrine. Liese also has one when she's enjoying her work.
Of Corsets Sexy: Liese's Stripperific leather corset, with bondage straps.
Our Fairies Are Different: The four sisters, Nina, Nineh, Nini and Ninu, are more similar to folklore in that they don't wear clothes, dislike humans, and enjoy playing pranks.
Perky Female Minion: Momo especially, but also the Nina sisters.
Power Trio: The three main heroines: Liese, Momo and Alette. Could also be the Three Faces of Eve, with childlike Momo, sensible Alette, and Hotter and Sexier and Darker and Edgier Liese.
- The Rival Power Trio: Otis The Hero, Gerard The Big Guy, and Irma the Squishy Wizard.
Ring Menu: The combat interface. The individual combatants have to be preloaded into it, and in combat turn like chambers of a revolver around the commander in the center. This means that you only ever have two choices for next attack, the combatant to the left or right.
Sex Face Turn: Inverted with Celes or Meisshiah, who do a Face Heel Turn if Felser seduces them.
Shrinking Violet: Alette is so shy she freaks when her own minions barge into her throne room. Subverts the Fragile Flower by turning into a thrashing, roaring dragon.
Spell My Name with an "S": Averted by the opening cinematic, which displays character names in romaji, yet mispellings abound for Liese (Leeds, Riz, Liz), Alette (Aletto, Aretto), Celes (Ceres, Seras), and Meissiah (May shea, Meisha, Meissa).
Stepford Smiler: Parushira always beams a wordless, cheery smile. Nothing seems to be sinister about it at all...until you notice she's surrounded by armed, marauding demons completely loyal to her. Which type she really is we can never know.
Super-Powered Evil Side: Felser, and Otis when corrupted to The Dark Side, exhibit a more superpowerful, eviller side.
Tactical Rock-Paper-Scissors: Though comparative stats play a role, Soldiers have a clear advantage over Archers, who have an advantage over Magicians, who have an advantage over Soldiers.
The Bad Guy Wins: Against all the yuusha. One ending Route in particular emphasises the triumph of evil in the epilogue.
The Baroness: Liese is Felser's dragon in the beginning and, depending on choices, to the end. She's proud, sadistic, leatherclad, insists on being addressed by noble honorifics even among her Nakama. Less chilly with Felser, since he's a noble and a Villian as well.
The Butcher: Felser gets the option to decapitate fallen (non-plot critical) enemies except where mandated by the plot. Liese lampshades your aversions while other characters lampshade when the trope is upheld.
The Computer Is a Cheating Bastard: Otis. Otis, Otis, Otis. Usually he leads a Quirky Miniboss Squad, but at the end of multiple Routes, he might take a few unexplained levels of badass, he might unleash a Super-Powered Evil Side that completely wrecks your party, or he might simply become unkillable (of course there's still a way to deal with that last one.)
The High Queen: Queen Sandrine subverts this by letting her mask slip to reveal a Lady Macbeth and completely demolishes it when she whores both herself and her daughter to save her life. Dine demonstrates this far more consistently, but even her composure shatters on her defeat.
Turn-Based Strategy: Combat is literally 'turn-based', as the combatants for each side are arranged on a wheel, which are turned once by each side per turn.
Twin Threesome Fantasy: Doubled to a Quadruplet Fivesome Fantasy.
Unfortunate Character Design: A lot of characters' hands are out of proportion. The most striking specimen to date.
Video Game Stealing: On a mass scale. You can order commanders to conduct looting raids on settlements, and this is where you get the majority of drops; heal potions, magic charms, better weapon, etc.
Villain Protagonist: Felser. In addition to invading and raping, Felser gets more powerful from spreading fear. The gameplay benefits of increasing Total Terror and performing acts of Destruction and Looting are too good to pass up.
Video Game Cruelty Potential: Aside from the cruelty gameplay demands. Your first choice in the game is which abuse to inflict on Garefu, a harmless old man. Ripping out his hair becomes both a Running Gag and a secret collection quest.
Visible Silence: Parushira communicates (or tries to) exclusively through this. Meisshiah isn't very talkative, sometimes expressively so. Liese does this when she's trying to control her temper. Felser often does this even though he's already audibly silent.
You Gotta Have Blue Hair: Even many humans have blue, green or purple hair. Demons have many more shades.
White-Haired Pretty Boy: Felser himself.
Zettai Ryouiki: Liese's attire would be A-grade but it adds lace trim and garters to the stockings, and removes slits down the sides of the skirt.