Disgaea 4 Complete+ is a tactical role-playing game by Nippon Ichi Software. The game tells the story of Valvatorez, a former tyrant leading a party to rebel against the president of the Netherworld. It was released for the Nintendo Switch in October 2019.
Combat is carried out in a turn-based strategy fashion. Allies can be deployed into combat, each with their own special skills and "Evilities", additional abilities that are applied to every character. Enemies and allies may be picked up and thrown, just like the previous Disgaea games. However, Disgaea 4 adds a new feature to its grabbing system, allowing any friendly character on the field to pick up another adjacent friendly character, and continuously pick up allies, in a tower fashion. When in the tower formation, the movement range of the stacked characters increase. The bottom character of the tower can also throw the tower ahead of him/her to further increase movement distance. Special abilities may be activated while in tower formation, such as specific team attacks and the ability to obtain items normally unreachable due to a wall.
Friendly monsters can be Magichanged by unique characters to become weapons. A new function has also been added called "Demon Fuse". With Demon Fuse, the player can join two monsters to form a giant version of the combined monsters, as well as increasing statistics. Demon Fused monsters can be Magichanged as well, and the result is a giant weapon, to correspond with the size of the Demon Fused monster.
Valvatorez owns a hub location known as "Hades". Here, equipment can be purchased or sold, specific functions can be carried out, the player can travel to other locations to advance the story, and such. Unlike previous Disgaea hub towns, Hades comes with the ability to be rearranged to the player's liking, as well as changing the appearance.
As the player progresses through the story, Valvatorez's amount of captured land will grow, and as such, more characters can be befriended. Various items can also be placed on the land panels, as well as characters. When an item is placed on a panel, it may affect the layout or gameplay when a battle is initiated on that panel. For instance, having a certain item on a panel allows captured enemies to be "Disciplined".
When an enemy is captured, when certain conditions are met, the player may "Discipline" the captured enemy. When an enemy is being disciplined, the player may force them to perform a variety of actions, such as "Slap With A Wad Of Bills". The player has a limited number of turns to perform actions on the target, and then the player may force the captive to give up their HL (money), force them to locate treasure for the player, recruit them as an ally, or simply let them go. If recruited as an ally, a disciplined enemy's job is renamed as "Ex-hostage".
Disgaea 4 Complete+ follows Valvatorez, a vampire who was once feared as a tyrant until he promised a woman 400 years ago that he would not drink blood until he could instill fear in her, and she died before he could do so. He now has a menial job in Hades, where the souls of dead humans are sent to be transformed into Prinnies, alongside his loyal servant, Fenrich. When the Corrupternment orders the mass extermination of all Prinnies, Valvatorez and Fenrich put a stop to it and, disgusted by the government's actions, Valvatorez plots a rebellion.
Valvatorez and Fenrich battle across the Netherworld to win the support of the masses, and along the way, they meet several allies; Fuka Kazamatsuri, a young human girl who died and technically became a Prinny, but kept her human body due to a lack of resources; Desco, a monster created on Earth to be the 'Final Weapon', who was deemed a failure and cast to Hades; Death Emizel, the Netherworld President's only son, who was betrayed and declared legally dead by the government; and Vulcanus, a thieving angel who bears a striking resemblance to Artina, the woman from 400 years in Valvatorez's past, but has an entirely different personality.
Finally, Valvatorez and his allies assault the Corrupternment with the help of the support they have gathered, and defeat Netherworld President Hugo. Shocked at his weakness, they discover that the 'fear energy', the power source of the demons, has run dry ever since humans became less superstitious and began fearing each other more than monsters and demons. Furthermore, they learn that this situation was engineered by a human named Judge Nemo, who now runs both Earth and the Netherworld from behind the scenes, and plots the destruction of both.
Valvatorez and his allies travel to Earth to stop Judge Nemo's plan of destroying Earth. First, they defeat Des X, the 'final version' of Desco and Fuka's original killer. Next, they go to the moon, which Judge Nemo plans to crash-land onto Earth, and save Earth again with the help of Flonne (a cameo from the original game), who inadvertently reveals that Vulcanus is in fact Artina, reincarnated as an angel. Judge Nemo's plans are foiled, but his incredible malice triggers Fear the Great, a machine created by God in order to purge all life on Earth. It is revealed that Nemo desires revenge for the death of Artina, who saved him in the distant past, and he cannot realize she has become an angel due to his evil. The party travels into Fear the Great and defeats Judge Nemo, saving Earth once and for all. Judge Nemo's soul prepares to vanish entirely, but Valvatorez decides to have it sent to Hades so that Nemo can reincarnate as a Prinny and atone for his sins.