MonsterGirl Quest: Paradox has been involved in a massive crossover project that involves the games The Three Charms and Shrift. It was added in October 2020 for free for all those that have bought Paradox: Part 2 and also include characters from Parade Buster, Succubus Quest, Succubus Rhapsodia, Succubus Prison and ROBF4SU
An RPG where the hero Kazuya wake up from an artificially-induced coma after an accident to find out that the world has been invaded by demons, creatures with female humanoid features that are attacking humans and corrupting their mind to devour their soul through sex. He must escape the place and join up with his friend Yuuma while foiling the nefarious monsters and M.O.W.'s artificial creations.
The story introduces The Twins as the main antagonist, known better as the incarnation of Abaddon, a fallen angel whose initial task had been devouring dead worlds and is now threatening to devour everything existing, and The 'Old One' as the hidden antagonist, as he is the ringleader behind Abaddon's madness, an 'Evil God' of eldritch properties who was trying to materialize in the real world using Kazuya as its vessel; and several other minor antagonists powered up by Abaddon: Black Hound, Vasilica and High Lamia from Super Monsters'n Girls, and Chimera Beast, High Slug and Beelzebubs from Monster Girl Quest: Paradox.
Kazuya isn't the only protagonist as he's supported by a Luka pulled from a world still under invasion from the Queen of Dreams, and also Marion, the hero from Super Monsters 'n Girls. The team is supported by Yami and Mizuki, original characters from Shrift, the Archangel Nakamura from Super Monsters'n Girls, and Alice from Monster Girl Quest who all act as supporting characters in a way reminiscent of Alice in the original part 3.
Kazuya is invited by the White Rabbit to a tea party organized by the Mad Hatter/Cheshire, one of Kazuya's acquaintances. As the duo waits for more guests, they're attacked by an unidentified monster but are saved by Yami. The characters regroup as they're chased from one world to another by Abaddon's assassins while the creature itself annihilates the worlds again and again. After finally regrouping in a hidden dimension created by the Mad Hatter, the strange being explains to them that Abaddon became mad in part because of the Twins Dolls created by M.O.W. and the old one attempting to incarnate through the numerous versions of Kazuya who committed genocide under the guidance of the player. Those versions of Kazuya are hollow guilt-wracked shells, and Mad Hatter reveals himself as a version of Kazuya having a change of heart and getting pardoned at the last second.
To everyone's surprise, Abaddon managed to reach the dimension and almost erase it, with the heroes being saved at the last moment while the Mad Hatter gets critically weakened to his Cheshire persona. Kazuya and his party find themselves in a place between dimensions created by Lucifer, another guest of the Mad Hatter's tea party, and face Abaddon's assassins again before dealing with the world-devouring locust. In spite of everyone's support, Kazuya ends up trapped in an illusion created by Abaddon based on the man's vision of his happy world and even loses his connection with the player while Cheshire gets absorbed as well. Kazuya is almost saved by the joined efforts of the White Rabbit and Hyakki, but the two get threatened by Abaddon as well. He's ultimately saved by Hecate, a demon lord who hates his guts, and he managed to take down Abaddon with the joined effort of Luka, Marion, and his latent angelic powers given by his past girlfriend. Exploiting his power, he manages to take down Abaddon for good.
However, once Abaddon falls, Octuael, an angel that betrayed Mario and the archangel Nakumara spawns while possessed by the Old One. The party's attacks are ineffective, and even a shot from a railgun gets stopped. However, Luka's arm suddenly transforms in the AΩ as the hero got repeatedly exposed to chaos. The arm casts the Logos Magia spell which critically weakens the Old One, and Marion finishes him by throwing the railgun. Luka doesn't remember what happened, and Alice remains silent on the matter while Cheshire is dumbfounded by this turn of events.
After the heroes' ultimate victory, the different groups return to their respective worlds, leaving Cheshire alone with Hyakki. The latter calls out the White Rabbit, and reveals that she knew she was Daji all along as the real White Rabbit is dead. While the two are concerned by the fact that the ambitious kitsune has such power, they have other concerns as well.
As Cheshire finds herself alone, Runaway Luka appears to the monster's surprise. It is clear the strange being has the intent to get her, but before he can reach her he gets skewered by Cleo Adra who tells her that her task is to plunge the world into chaos. As the apoptosis leaves, Cheshire muses on the fact that the hero's world is out of time and how he has to "search for the third way", echoing the words of Apiros Lagos at the end of Paradox's own Collaboration Scenario.
An RPG series where Hakunen, a young monk boy searches to learn how to fight from Daimyokai, a rumoredly powerful yokai hunter who's currently traveling on the mountain of Mahobora. However, the peaceful man ends up meeting Magatsu, the yokai guardian of the mountain who gives him three different body-binding charms to allow him to escape any yokai on the way.
The Collaboration only includes Monster Girl Quest and starts after the events of the third title, Lonesome Spirit. The mountain of Mahoroba is suddenly threatened by chaosization. Hakunen ends up meeting Promestein as well as several monsters from the MGQ world, namely a Slime Girl, a Harpy, a Novistador Girl. The reason Mahoroba is affected is because of the world's proximity with the MGQ one, resulting in an apoptosis named Metamo Metamo deciding to step in to stop chaosization.
The story starts when Hakunen and one of his companions, Yamachichi, notice an unusual anomaly in the mountain of Mahoroba. As they explore the source, they end up meeting Slime Girls as well as Promestein who's recognizing Hakunen, even if he's a different one than the one she dealt with. After failing to get answers from slimes, Magatsu asks for explanations from Promestein, who tells her the gist of the situation. They eventually reach the source of chaosization, which also started to affect the local Spirit Foxes. After taking samples of the place and discussing the danger of the apoptosis phenomenon, Hakunen decides that Promestein should consult with Tsukumo, a local elder yokai scientist.
As they look for ways to close the wormhole before it threatens the world, Promestein decides to give Hakunen the Brave Driver, a gauntlet that uses Luka's cells to interfere with space and time but needs to be powered with the four elements. After much difficulty, Hakunen manages to power the gauntlet to close the rift, however, Tsukumo turns against the party as she wants to keep the rift open to examine it (and to keep the monster girls from leaving). The party still successfully close the rift, but an apoptosis named Metamo Metamo passes through before that.
Metamo Metamo transforms into Promestein at first and starts wreaking havoc, attracting Hakunen's attention. The monk boy and his companions are overwhelmed at first, but the elders step in and support them, although even if they do succeed in beating back the apoptosis, the whole area remains affected by metastasis. Promestein comes to the conclusion that they have to use the Brave Drive again to take the apoptosis down for good. To her surprise, Metamo Metamo transforms into a "strong warrior from her world", namely Luka. The transformed apoptosis unleashes Quadruple Giga, which Hakunen barely survives. Eventually, Metamo Metamo acknowledges that she's at risk of losing, and decides to absorb data from Marcellus and Heinrich as well to become even stronger, but fortunately, Hakunen throws her back in the rift before she can finalize her transformation. After saving Hakunen from the collapsing rift, Promestein, and the other monsters return to their world through the portal, a charm of Mahoroba in her pocket.
The Alliance of Wisdom briefly appear to reveal that they followed the unfolding events and that they'll keep an eye on Promestein "beta". They decide to pursue their goal of finding a way to stop the destruction of all worlds.
Metamo Metamo transformed into Idea Lukas appears briefly with the Apiro Lagos as well, and after the latter teases the former about his appearance, they once again announce their goal to return all the worlds to chaos.
A game from the creators of Succubus Quest, the world of Est. A school suddenly transforms into the hunting ground for a quintet of succubi who alter the environment and can threaten the world. It's up to the protagonist to make them leave by satisfying them, which will be deadly. The place ends up so twisted that doors leading to unusual guests show up, including MGQ's succubus queen, Alma Elma.
A mobile tower defense game, Alice and the Heavenly Knights join the fray available with the two-tailed Kitsune, Lime and Rami to fight the endless waves of monsters. On the other side, Adramelech has stepped up amongst the spread of chaos.
The story starts with Luka, Alice, and Tamamo appearing on a beach thanks to a transponder they used to take a vacation in a different world. They're worried that they got separated from the other Heavenly Knights. They quickly meet up with a local pegasus girl and an orc respectively named Suzu and Patel who think they're poachers. After clearing the misunderstanding, they find Granberia, but the latter acts erratically and aggressively hits on Luka. They beat her up, and once she calmed down, Suzu realizes that the dragonkin suffers from the "Unsightly Syndrome" that makes monsters want to hit on men that have the attributes of young boys. Since the only way to cure it is to use the power of the Four Beast Gods, they decide to look for Vivi, their contact while Tamamo stays behind to repair the transponder.
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