Visual Novel: Demonbane aka: Kishin Houkou Demon Bane
I am innocent rage I am innocent hatred I am the innocent sword I am DEMONBANE
Kurou Daijuuji is a poor detective living in Arkham City (no, not that one). One day, he's asked by Ruri Hadou of the Hadou Financial Group to search for a magical grimoire. As Kurou searches for the book, he unexpectedly runs into Al-Azif, a pretty girl who turns out to be the grimoire Kurou is searching for. While being chased by the villainous Black Lodge, Al forges a contract with Kurou, bestowing him with powerful magic. Soon afterwards, Al also activates the Demonbane, a Deus Machina owned by the Hadou Financial Group, to combat the mechanical menace from the Black Lodge. With this, the war between the Hadou Financial Group and the Black Lodge begins....A series by Nitro+ with Humongous Mecha and Cthulhu Mythos elements, it began as an Visual Noveleroge for the PC, then was ported to the Sony PlayStation 2 as a non-eroge remake. A sequel action game, a prequel novel, an OVA, an Anime of the Game and a conversion to manga followed the remake.
Tropes employed in this series are:
Achey Scars - Sandalphon's face bleeds when he gets too upset about Leica.
The Antichrist: Master Therion, according to one of the trivia pages, translates to 666 in a magic system that assigns numerical values to letters, and he has a personality cult and vast magical ability..
Badass Grandpa - Every image we see of Ruri's grandfather points to him being this. Just look at those muscles, and that hair, and that pose! "Hadou Kozou" at that point isn't Hadou Kozou at all, but a time-traveling Kurou from the future. Yes, seriously. The sequel adds Laban Shrewsbury to this trope.
In Ruri's route, this would have... implications. Ironically enough, this information is only revealed in Ruri's route and she seems fairly okay about the whole revelation.
Made less squicky by the fact that he's not related to her by blood but by adopting her father before she was born.
Badass Normal: Winfield. Stone and Ness get their moments as well.
In a weird mix of this trope and Brought Down to Badass, the Demonbane becomes this in Al's route after her apparent death, forcing Elsa to take over. True, Demonbane can't use most of it's attacks aside from its fists and Lemuria Impact, but it's still more than enough to take out at least one of the Anticross' Deus Machina.
World of Badass - Excepting faceless civilians, everyone is this. Hell, even Stone and Ness qualify as Bad Ass, if for no other reason than the ability to survive the kind of stuff that would kill anyone else more times than one can count, even when they are at ground zero for a lethal attack!
Because You Were Nice to Me - Al falls in love with Kurou because he is not like her previous masters. Unlike them, he treats her as a human and more than that, as someone important. The souls of her previous masters admit that when they were working together in the past the various pairs shouldn't have treated each other like tools.
Brought Down to Badass - In Al's route, she temporarily dies. While she's gone, Kurou is forced to fight without her. While his performance certainly suffers, he still ends up a rather competent fighter.
Butt Monkey: Kurou does not have much luck with the women in his life. At all.
Doctor West is also one, especially if you count all the times he gets "beat the shit out of". In fact, his own creation (Elsa) falls for Kurou and treats her creator like crap, her programming be damned.
Conservation of Ninjutsu - You'd think that when the true, full-power Demonbane has the ability to summon every Demonbane that was, is, will be, wasn't, isn't, won't be and can't be to fight alongside it, this trope would be the first thing to come into effect. Thoroughly subverted, as having infinite Demonbanes makes it truly unstoppable.
Demoted to Extra - Despite being major characters, Metatron and Sandalphon are nowhere to be seen in anime adaption. Also Alison, who got a whole chapter of focus on her Character Development in the visual novel version only.
Depraved Bisexual - Tiberius, though his preference seems to slant towards women, has some creepy affectionate dialogue for Sandalphon.
Dying as Yourself - Subverted. Ryuuga dies insane and hating Leica. Or perhaps that was his true self and the boy Leica knew was just a lie. Due to rejecting the idea of dying sane or at peace, he does not reincarnate into the restructured world at the end of Leica's route.
Eldritch Abomination - A few. The likes of Dagon and Hydra don't bother anyone too much but the likes of Cthulhu cause some major brain breaking at first.
Eldritch Location - An entire section of the city has been sealed off for being one of these. Any normal person who enters would simply die instantly.
Electra Complex - Another Blood wants to replace her mom. To make it more complicate, she comes from an alternate future and thus is not really related to her parents in the present. And since she's a book like her mom, their genetic relationship is hard to judge.
Ending Fatigue - In-universe version. In prequel novel, Nyarlathotep got bored of never-ending battle between Gunshin Kyoshuu Demonbane and Gunshin Kyoshuu Liber Legis (after watching it for strange aeons, even attack that destroy multiverses can be boring...). So she tweak the timeline, kicking whole events of prequel out of canon (and erase those two from reality), result in one that of the Visual Novel.
Most members of Anticross have contempt for Tiberius. Doctor West finds him to be an illogical abomination, and Sandalphon even resorts to Enemy Mine with Kurou to screw him over.
A few members of Black Lodge find excess violence rather distasteful. Titus will kill people far below his level if ordered to, but otherwise finds it pointlessly brutal. Doctor West also finds outright slaughter to be so unappealing that he defects after calling out all of Anticross at once and getting stabbed for his trouble.
Evil Cannot Comprehend Good - In Elder Gods ending, Nyarlathotep express its confusion at Kurou and Al as they continue to fight for humanity after ascend into Elder Gods. The narration make it clear that, to the Ancient Ones, there shouldn't be any good gods.
Evil Counterpart - Liber Legis is the ultimate evil to Demonbane's ultimate good and they have similar but opposite attacks. Metatron and Sandalphon also have this dynamic going on.
Evil Is Deathly Cold - Master Therion's Liber Legis' "Hyperborea Zero Drive" reduces its target's temperature to absolute zero. Also, Caligula's Kraken's main attack.
Ithaqua too, since all magic is technically "unholy".
The bad ending, Kurou becomes Nyarlathotep's plaything. Trapped in a timeloop, he lives in the world that became an Eldritch Location after the the destruction of Shining Trapezohedron. At the end of each loop, he will meet Al but never get a reunion with her.
In Al's route, they don't really bother trying to kill Tiberius. Instead, he gets sucked into the Shining Trapezeohedron. Al and Kurou couldn't see what was in there from where they were, but Tiberius certainly could. What he saw was enough to make the crazed, monstrous immortality freak actually beg for death instead of being sucked inside. Kurou simply points out that after all the horrors he perpetrated to become what he is now whatever is in there surely won't be enough to do put an end to him either.
Faux Affably Evil - Vespasianus. Sure, he's fairly erudite and disturbingly polite for an Anticross member, but his deeds and what he'll do to accomplish them reveal it's but a thin veneer over his Mad Scientist self.
Gag Penis - Kurou and Therion have inhumanly large members, to the point that they are almost impossible to take seriously. How the girls manage to take them in all the way to the hilt is...probably best not thought about. Fans like to speculate that it's indicative of their magical potential (with the backhanded implication that Doctor West has a tiny one due to using science over magic).
Genre Blind - Nero is indeed the most powerful among Anticross and has no problem fighting both Augustus and Vespasianus at same time. Too bad, she confront them inside Cthulhu, surround by countless tentacles. Since Demonbane start as eroge, it doesn't matter how powerful she is...
Then subverted later on when she kills Vespasianus in the blink of an eye and would've done the same to Augustus if it hadn't already been done for her.
Genre Savvy - The entire civilian population of Arkham City seem to be transplanted from The Big O and Bubblegum Crisis, especially given their in universe reactions to all the crazy shit that happens every other day.
Girls Are Really Scared of Horror Movies - Invoked and averted should you decide that Kurou and Ruri will watch a horror movie. Winfield thinks that Ruri will get really scared and thus the standard scene will take place... but as Kurou and Ruri point out in utter boredom, they see this kind of thing every day and fight such monsters.
In the prequel novel, Demonbane appears as ''Gunshin Kyoshuu Demonbane'', particularly notable for being the largest mecha in fiction, even larger than Super Tengen Toppa Gurren Lagann. It grows so large that it pops the universe it's in, and accidentally destroys other universes by brushing against them. Of course, its Arch-EnemyGunshin Kyoshuu Liber Legis is just as big and powerful.
Hypocritical Humor - Tiberius crying rape when Al tries to remove De Vermis Mysteriis from him.
If I Can't Have You - Sandalphon isn't crazy because Leica killed him once. No, he was always crazy and a yandere for her and thus he simply can't accept a Leica who wasn't his big sister.
Mega Manning - If something belongs inside her pages, Al can use its ability once she's subdued it. Kurou also gains the support of Cthugha and Ithaqua after managing to force the pair into submission. Not that he can ever admit how he managed to do it.
Meganekko - Leica, Nya, Chiaki and Ithaqua in human form
Mind Screw - Al's Bad Ending. Seriously. Also one of the ultimate powers of the Shining Trapezohedron, which is to summon every Demonbane "that ever existed, could exist, never could exist, and never existed." Don't try to think about that one too hard.
Only Sane Man - Crossed with Irony and Played for Laughs. Despite the Lovecraftian premise, the sillier moments of the game have Kurou bemoaning he seems to be the only one with a constantly level head.
Perpetual Poverty: Kurou is so poor that he considers putting jam on toast and instant coffee to be living it up. He actually cries Manly Tears when Ruri offers to employ him. Averted in Ruri's routes where he becomes rich either by going back in time and becoming Kouzou Hadou and creating the Hadou fortune or by presumably marrying Ruri.
Power Dyes Your Hair - Kurou's hair turns white when in Magius Style. The blond Leica's hair also turns white when she activates her cyborg bits.
Power Limiter - Using Demonbane's Lemuria Impact requires the Naascal Code. On the plus side, it doesn't drain any energy.
Pragmatic Adaptation - Demonbane's animated ending is entirely original, made exclusively for the TV series. While it appears to take after Al's good ending, instead of having her drift through space for eons, the Elder Gods Kurou and Al-Azif (from Al's true ending) rescue her and bring her back to Arkham City. The superior quality of the ending is attributed to the fact the animation staff enlisted the aid of the original work's staff for the final episode.
Rasputinian Death - A lot, though certain instances like Caligula and Claudius stick out. The former takes a bullet or shrapnel to the eye, has an arm blown off and recovers before having to be outright exploded before dying. The latter is basically opened up from one shoulder to the opposite hip and has his intestines blown out before finally dying due to being chopped in half. Apparently the disemboweling wasn't enough.
Screw Yourself - Kuzaku and Another Blood, even official art potray them in questionable manner.
Sealed Evil in a Can - The true nature of Shining Trapezohedron is a sealed universe that imprison Outer Gods like Azathoth and Shub-Niggurath.
Serial Escalation- Elder God Demonbane's Athleta Aeternum ability can summon countless variant of itself in multiverse. And not just those exist in the multiverse, it can summon those that shouldn't exist as well.
Shoot the Shaggy Dog - Kurou went through much trouble just to save Ennea. Only for her to die in Master Therion's revival.
Stable Time Loop - Kurou is stranded in the past with Demonbane after his battle with Master Therion and losing Al. He receives a map to gold veins from a dying Hadou Kozou, impersonates the latter, founds Arkham City on the location of the gold, takes care of the son of Kozou's wife and later Ruri (as her "Grandfather"), and arranges for Kurou to be received into the Miskatonic University and sets into motion Kurou's story (including meeting up with Al, acquiring Demonbane, etc). He then dies afterward at the hands of Master Therion. The cycle is broken at the true ends of each heroine's route.
The Super West Invincible Robot Type-28 Special(s) maybe weak when compared to Deus Machina, but at least it can withstand Demonbane's head vulcan guns. One of the mass production Destroyer Robot even got disabled by Winfield on foot in Ruri's route.
The sequel reveal that Claudius's Celaeno Fragments is just a copy of Laban Shrewsbury's, which also has girl form call Hazuki. Similar to his Deus Machina, the Lord Byakhee maybe fast, but it still can't compare to Shrewsbury's Ambrose.
Super Robot Wars: Makes its debut in Super Robot Wars UX. Note that UX will obviously not adapt the original Zanma Taisei visual novel, but the Kishin Houkou anime instead, making this the first series inclusion in an SRW based off of a visual novel.
Thanatos Gambit: Nerotries this near the end. Specifically she tries to force Kurou to kill her with the Shining Trapezohedron so that Master Therion won't be reborn and Nyarlathotep's plan will be ruined permanently. Unfortunately Kurou turns out to be powerful enough to stop her without killing her.
Theme Naming - The Anti-Cross are named after Roman emperors. Al's route reveals that Master Therion bears one too: Domitian.
The Starscream - Augustus and Vespasianus both have aspirations of this.
Tsundere - Evidently Al, but the visual novel expands this to Ruri in her individual character route.
Two Guys and a Girl - Odd variant here. Nya seems to like trying to seduce Kurou and Master Therion, depending on her whim, and even though the latter party is aware of this, the usual jealousy one would expect is absent.
Tykebomb - Metatron, Sandalphon and the Tyrant, though rather than being their primary purpose it's a useful (or rather annoying, depending on one's point of view) side effect.
Unknown Rival - Doctor West is convinced that he's Kurou's rival, but Kurou just thinks of him as a pest.
Verbal Tic - Elsa's "-robo" is what convinces Kurou that she really is a robot, apparently.
Villainous Crush - To quote Nyarlathotep in Elder Gods ending, "Then I shall answer you with unforgiving hate, and unrelenting love!".
Vitriolic Best Buds - Caligula and Claudius act like they want to kill each other. After Caligula dies, all Claudius gives a damn about is avenging his death.
You Don't Look Like You - The artist took very deliberate interpretion on Great Old Ones appearance. Atlach-Nacha is a Giant Spider with human torso in place of its head. Cthugha has beast-like body in the middle of massive fireball. Ithaqua first seen as glowing red eyes in the mid of violent storm (Death Walker as called in Call of Cthulhu) but is really a massive dragon.