For a long time I’ve wondered why Roblox doesn’t have a real open world game dedicated to Death Note. The only existing game in roblox is a murder mystery and that made me think of the idea of a living, complex world where the notebook becomes an investigative and psychological element. Almost a narrative sandbox where every player can become part of a story.
Explanation of Terms
First of all i will explain what these terms mean so that anyone reading does not get confused. L is a Wammy’s Boy who becomes a detective and receives benefits such as police support, access to investigations, and sometimes questionnaires that give him vague but useful clues to help him find Kira. Kira is the main owner of the notebook, but he can have accomplices to whom he gives notebook pages so they can kill remotely.
World structure
The game world would be divided into six major countries inspired by continents, each with three regions modeled after real nations: Europe (with France, the United Kingdom and Italy), North America (with USA, Canada and Mexico) South America (with Brazil, Argentina and Colombia) Asia (with China, India and Japan) Africa (with Nigeria, Egypt and South Africa) Oceania (with Australia, New Zealand and Papua New Guinea).
Each country would have cities, schools, universities, jobs, crime, police, organizations and social networks. In each server only a few Death Notes can exist (if you try to enter a server with too many notebooks and you already own one, you cannot enter, so you must switch server or wait for a notebook holder to leave), scattered randomly and reassigned every time the owner dies or loses ownership. Some players may spawn with Shinigami eyes (which would be rare), others may obtain them through the trade, accepting a predetermined future death.
Life system and death date
When you spawn into the world, no one has a predetermined death date. Life is potentially infinite until you come into contact with a Death Note.
The moment you become the notebook’s owner and commit your first murder, the system generates a random death date that represents the spiritual price of using the notebook. This date is not fixed: it can improve or worsen depending on the player’s actions. If Kira kills detectives, investigators or in general players whose job is to catch killers, he gains years of life, being rewarded for eliminating those who threaten his mission. On the contrary, if he only kills criminals without ever actively countering the Wammy's Boys or the detectives, his life shortens, making him more vulnerable and easier to capture. This creates a moral and strategic balance that forces every Kira to choose what kind of killer he wants to be and how much he is willing to risk to survive.
All of this would create an open‑world game where every choice has consequences and where tension doesn’t come from combat but from the fear of being caught.
Death Note ownership and Shinigami roles
Whoever finds a Death Note can choose whether to use it or not. If they decide to write, their life changes forever. Upon the owner’s death, the player can reincarnate after a period of void or become a Shinigami, generating a new notebook and choosing where it will fall. Shinigami players must remain impartial (to avoid ruining the experience of players), otherwise they die and end up in the void as well. To extend their life they must complete missions against NPCs remaining invisible to anyone who hasn’t touched their notebook.
Kill mechanics, information gathering and prisons
Death Note owners can tear pages and create squads of accomplice killers, but killing is not simple, you need to know name and face, and in a world where everyone can disguise themselves, change identity or hide their face, obtaining information becomes a mental game.
Prisons become places of tension, because captured criminals will have their full name exposed and can be manipulated by the notebook or forced by law enforcement to become bait to lure Kira (if they die they will have the chance to reincarnate and start a new life, or if they manage to stay alive they can obtain benefits from the police and a reduced sentence, therefore freedom).
Police officers must maintain order, some may have fake IDs if they work with the FBI or with L (Wammy's boys who choose to be detectives), while civilians can obtain disguises and weapons, but civilians will still have to work to pay taxes and food, so being a vigilante indefinitely without it becoming a profession will not be easy.
Notebook distribution and theft dynamics
Each country hosts about three notebooks, but finding them is extremely difficult. If you manage to identify the notebook owner (Kira) without being discovered, you can blackmail him to obtain pages or even the notebook itself, but the Death Note keeps the category chosen by the previous owner: if he only killed criminals, you must do the same until he dies with the notebook in hand, resetting it.
Free criminals (civilians who choose to become simple criminals to earn more money) can steal the notebook, forcing Kira to hide it with traps (like Light’s drawer trap) or carry it with him at all times, risking police checks. If a player doesn’t log in for too long, he loses ownership and dies, while the notebook is relaunched into the world.
Shinigami players and NPC Shinigami
Kira can choose whether to have a Shinigami player (usually those who have a Shinigami friend can choose this option) or an NPC Shinigami.
The Shinigami player is bound to the owner and must follow him everywhere. If he gets tired (in case the player doesn’t have a strong bond with their Shinigami, this bond can be established by giving apples to the Shinigami) he can kill him by writing his name but if he kills someone to protect him while the owner is physically or psychologically injured, he dies as well.
NPC Shinigami are more detached, similar to Ryuk and can perform small missions in exchange for apples.
Moral system
The moral system is central. Every player starts with neutral morality, but criminal actions lower it. Kira sees his morality decrease with every murder and when it drops too much L (the Wammy Boys) can detain him even without evidence. Morality returns to normal only if the notebook is handed over or if its existence is completely forgotten. Handing over the notebook is not enough to be innocent in the eyes of Shinigami, while forgetting it is.
Role of detectives and Wammy Boys
Detectives and Wammy's Boys have a fundamental role. Wammy Boys start as gifted children, they must train their deductive skills inside Wammy’s House and can choose whether to stay until 18 (with a gamepass you can leave at 14 like Mello did) or go out into the world, becoming investigators (L), criminals, scholars (that will help you get a degree and become a CEO) or even serial killers like Beyond Birthday.
Each country has three regions where Wammy's Boys that choose to become investigators can broadcast livestreams to threaten Kira, block transportation and narrow the search area. L receives questionnaires with clues to deduce Kira’s age, job and experience, and can tail suspects with the help of Shinigami players by placing Near’s shinigami face recognition software (which can be bypassed simply by going underground) or if he has touched the notebook of that specific Shinigami.
A living and dynamic world
The world is composed of companies, universities, criminal organizations, mercenaries, scammers, international police. Kira can infiltrate anywhere, but being part of a large group means leaving more traces for L. Identities can be falsified, detectives can pretend to be L and underground criminals can be hired by anyone, even Kira.
Roleplay Features and Civilian Careers
Civilians will also be able to work as journalists or TV hosts (playing with information and choosing whether to obstruct Kira or indirectly support him), police officers or detectives (but they will not receive questionnaires or clues, nor the ability to use media to track Kira; instead, they will have to personally dive into the hunt for him, while regular police officers will deal with classic criminals and occasionally take part in missions against Kira, such as searching houses or buildings). They can also become CEOs and create companies or be part of them.
Money will be extremely important for anything a player wants to do; the more money you have, the more choices you have, including whether to obstruct the police or not. There will also be normal jobs like barista, shop clerk, teacher and many more to give the game a roleplay aspect. If you happen to be a police officer, you technically have a higher chance of finding a Death Note while searching a house, and you are not obligated to report it to your superiors so you can choose to keep it for yourself. Kira can be any one of these professions, so no one should ever trust another player blindly.
Shinigami gifts and biometric powers
There is also a system of Shinigami perks that players can obtain through gamepasses or by sacrificing years of life and after a certain number of kills. Eyes, fingerprints, ears, wings and other biometric powers allow players to identify people through physical, vocal, olfactory or tactile analysis.
The wings, create a suspended shadow and distort gravitational fields, generating unsettling luck (hindering detectives’ investigations) and a void around the owner that allows interference with electronic devices.
Fingerprints allow reading palm lines and muscle tension to deduce identity,
ears analyze pronunciation and oral structure to understand if a name is false,
the sense of smell recognizes unique chemical imprints and leaves a trail.
Additional info
Shinigami players can also exchange ownership of their notebooks, but this can only happen with another Shinigami player and never with an NPC.
In the game, players will be able to speak quietly or privately to avoid leaking information, and there will be a specific number of Wammy Boys starting from A to Z. If two people choose the same letter, the first will be J and the second JJ, with a limit of two; after that, the player must choose another letter.
A Death Note can be handed over up to six times; after that, morality will always reset to normal and the player will no longer receive the same advantages from NPC Shinigami.
Players will be able to create companies if they have money and enough experience but if Kira is an employee he could damage the company’s reputation. There will also be assassins or L’s accomplices with fake IDs who pretend to be him and infiltrate groups to locate Kira. If Kira is being investigated by L, he can change his victim category and kill anyone he considers dangerous.
A Kira who is part of large organizations such as Yoruba, the mafia, or the police will give more information to L simply because he operates in a wider field, but at the same time Kira will be advantaged because he belongs to a large group that benefits from his actions and tries to protect him.
For now, this is everything. Let me know your opinion and what you would change or add.
