Your Roblox game, built in your Studio by the Nemesis AI.
Describe your game in one sentence. Nemesis gets Claude and ChatGPT working together to build it in your Roblox Studio, then tests it for you. No coding needed.
One-time payment, lifetime access, no Nemesis subscription.
>_ Full game #1
You
Make me a sword fighting game on a floating island, with a temple, powers and stone guardians.
- Combat design
- Art direction
- Island, temple and arena
- Sword and combos
- Powers and effects
- Stone guardians
- Interface and playtest
7 of 7 steps
Roblox Studio
Ready to playtest
Two AIs that work together
Claude builds, ChatGPT draws and checks, and each takes over from the other. One is enough to start.
Tested for real
It plays your game, looks at its screenshots on desktop and on a phone, and fixes what it finds.
You write, it builds
One sentence is enough. Everything lands in your own Roblox Studio, without a line of code.
Ready in minutes
An assistant connects your PC, your subscription and Studio for you, one screen at a time.
You write. Claude and ChatGPT build. You play.
Two AIs on the same game: Claude builds in your Studio, ChatGPT draws the references and judges the result. Nothing is called done before it has been looked at.
- You describe your game in one sentence.
- ChatGPT draws the reference images; Claude sets the art direction and builds, with real 3D models; ChatGPT checks the screenshot against the references and Claude fixes it until it passes the quality bar.
- Your game is in your Roblox Studio, ready to playtest.
A real game, built by Nemesis alone.
Lames Célestes: a sword fighting game on a floating island, with a temple, powers and stone guardians. Nobody touched it by hand.
The temple path
The magic-circle arena
A light power
An earth power
The stone guardians
The floating island
Which game do you want to make?
Each genre asks for different systems. Pick yours to see what it takes and how Nemesis builds it: to measure, never from a ready-made game.
Obby
An obby is an obstacle course.
Tycoon
A tycoon is a base that grows: the player buys a machine, it produces, they buy the next one.
Simulator
A simulator repeats a simple action — hit, collect, run — and rewards the repetition.
Horror
Horror does not rest on the monster; it rests on what the player cannot see yet.
RPG
An RPG is the heaviest genre to build: it needs a world, a combat system, progression, quests and a save system that never loses anything.
Survival
A survival game keeps continuous pressure on the player and gives them the means to answer it.
Racing
A race is played at speed, and that changes everything: the player has no time to read the scenery.
Combat & PvP
In a fighting game the smallest imprecision costs: the player who loses must understand why.
Tower defense
A tower defense is played with the head: the player places, upgrades, reacts.
Roleplay
A roleplay game is not won: it is lived.
Farming & fishing
Sow then harvest, cast then reel: these games rest on a short wait and a variable reward.
Story & mystery
A story game holds by its progression: the player moves forward because they want to know what comes next.
Pets & collection
A collection game runs on a simple desire: to complete.
From an idea to a playable game
The whole game from one sentence: every step depends on the previous one, so Nemesis does them in order and plays the game to check it as soon as a change can be played.
- Step 1
Understand
Your idea becomes a game specification: genre, loop, zones, systems, what you do not want.
- Step 2
Art direction
Before anything visual is built: a style chosen for your request, a palette, materials, lighting and hero pieces, with reference images drawn by ChatGPT when it is connected.
- Step 3
Build
The world is composed in your Roblox Studio through the official Studio MCP server: zones, landmarks, gameplay objects, materials, and hero buildings as real 3D models made with Blender.
- Step 4
Code
Server-authoritative Luau systems: progression, saving, economy, combat, UI — whatever the genre needs, in readable, commented code.
- Step 5
Judge
A real screenshot is scored on a fixed grid (style, detail, materials, lighting, readability, effects, interface), by ChatGPT when it is connected: a separate judge from the builder. Below the bar, the gaps are fixed and the scene is scored again before Nemesis calls it done.
- Step 6
Play
When the change is something you play, a short playtest runs inside Studio, about twenty seconds with one player and a single session for every pane: the character moves, jumps and heads to the key places, server and client logs are read, frame time is measured, and errors go back for up to two rounds of fixes. A defect that resists becomes a note for you, never a loop.
What Nemesis does for you
- Claude and ChatGPT in the same production, with the know-how of every role in a game studio: Claude builds in your Roblox Studio and plays the game; ChatGPT draws the references, judges the screenshots and takes over at Claude's limit. One subscription is enough to start.
- Every game is made to measure from what you ask: no ready-made game, no template to fill in.
- Effects built in layers (flash, particles, debris, camera shake, sound), combat animations with weight and hit-stop, and interfaces that share one style across the whole game.
- A workspace where every request opens its own pane and several run at once, with a status bar (Studio, Blender, your Claude and ChatGPT subscriptions) and a Compact or Detailed view.
- A game plan and an art bible kept for each project and read before every addition, a check that the core loop really exists, a consistent style across sixteen style sheets, and a check for props that float or sink into the ground.
- Interfaces at the level of the top Roblox games: a UI kit, icons in one shared style, a phone-sized check, and safe game keys — never W A S D, Space or Shift, which already move the player.
- Buildings and props as real 3D models made in Blender, installed for you if it is missing; organic creatures with Meshy and images with fal.ai, both optional, with your own keys.
- Writes and edits Luau code in the context of your whole project, then runs a security and debugging pass, with known Roblox fixes applied first.
What you should know before starting
- The interface, the reports and the assistant's replies are in French today. You can describe your idea in English, but you will be reading French.
- Nemesis Desktop, the app that connects Nemesis to your Roblox Studio, runs on Windows. There is no macOS version yet.
- There is no free tier. Nemesis is sold one way only: Nemesis Lifetime, a single payment of €97 at the launch price. It works with your own AI subscription, paid separately to its provider.
- Nemesis never publishes anything on your behalf and never asks for your Roblox password. You sign in with Google or with Roblox OAuth, and publishing stays your move, from Studio.
- Nemesis takes inspiration from the mechanics of existing games and can reuse free kits published by other creators, but never the map, the characters or the music of an existing game. An idea inspired by a known work becomes an original game.
Pricing
One product, one payment. No Nemesis subscription, nothing to top up.
Nemesis Lifetime
€97€117 after the launch offer
One payment · lifetime access · updates included
Included
- Nemesis Desktop for Windows, with its updates
- The workspace: the whole game built in a single pane, then whatever you add
- Deep research on a reference game you name (public Roblox page and wiki)
- Idea → game specification
- Roblox Studio driven through the official MCP server, with visual checks and playtests
- Trends: what is working on Roblox right now, with player curves and an estimated Robux range — an estimate, never a promise
- Thumbnails: game icon and banner (with your fal.ai key, or drawn by your ChatGPT subscription)
- Robux shop: developer products and Game Passes created with your Roblox API key, after you confirm
- Voice dictation (with your fal.ai key)
Not included — you bring it
- Your PAID Claude or ChatGPT subscription, billed by its provider (a free account is not enough; Claude Max recommended to build a lot).
- Nemesis works inside your subscription's usage limits (the 5-hour window and the week): it stops cleanly at a limit and picks up again when it resets.
Payment by Stripe. Checkout and account pages are in French.
Full details (in French)What you need
- A Roblox account, which Roblox Studio needs anyway. You can sign in to Nemesis with it or with Google.
- Roblox Studio, free from Roblox.
- Nemesis Desktop for Windows, connected to Studio through its official MCP server.
- Your paid Claude or ChatGPT subscription: the Nemesis Desktop assistant connects it with you, one screen at a time, after four screens on the site.
- Blender, the open-source 3D tool: if it is not on your PC, Nemesis Desktop installs it for you.
Your AI subscription is billed by Anthropic or OpenAI, not by Nemesis. Custom images and organic 3D creatures are optional, with fal.ai and Meshy API keys in your name, each billed by its provider; Blender is free. A Claude account without a paid plan is not enough.
Questions people ask about AI and Roblox
Can AI create a Roblox game?
Yes, if the AI works inside Roblox Studio rather than only in a chat window. A general chatbot can write a script you paste by hand; Nemesis composes the world in Studio, writes the systems, takes screenshots, runs a playtest and fixes the errors it finds. The result is a playable game you own, built under your Roblox account.
How do I create a Roblox game with AI?
Describe the game in a few sentences: what the player does, why they come back, what it looks like, and what you do not want. Connect Nemesis Desktop to Roblox Studio, then write. Each thing you ask for opens its own pane, several at once, on your own AI subscription and within its usage limits. Ask for a whole game and Nemesis builds it in one pane, then polishes it, reviews its code and runs a playtest; you complete it message after message.
What is the best AI for Roblox game development?
It depends on what you need. For a code snippet, any strong model works. For a whole game, you need a system that knows Roblox specifically — server authority, DataStore limits, mobile readability — and that can act inside Studio and test its own work. Nemesis is built for that second case. It uses a state-of-the-art model by default, and a faster one for simple edits where the first would add nothing.
Does Nemesis work with Roblox Studio?
Yes. Nemesis Desktop connects to Roblox Studio through Roblox's official MCP server. That is how it builds worlds, writes scripts, takes screenshots and runs playtests in your own Studio, on your own place file.
Do I need to install Blender?
No. Nemesis uses Blender, the free and open-source 3D software, to build your game's buildings and props as real 3D models. If it is not already on your PC, Nemesis Desktop asks for your permission, then downloads the official release from blender.org, checks the file and installs it for you, without admin rights (about 400 MB, once). If you already have Blender, Nemesis uses yours.
Can I ask for several things at once?
Yes. In the workspace, every request opens its own pane and several move forward at the same time without getting in each other's way. A status bar shows Studio, Blender and your subscriptions, and what is running, waiting or done; you pick a Compact view (one line per request) or a Detailed one (one pane per request). When a change has to be played to be checked, Nemesis runs a single playtest for every pane, and only then.
What do ChatGPT, fal.ai, Meshy and Blender do?
Claude builds your game. ChatGPT, if you connect it, gives a second look at the screenshots, takes over when Claude reaches its limit, and draws the thumbnails when you have no fal.ai key; without Claude, it builds on its own. fal.ai, with your key, makes icons, textures and images. Meshy, optional, makes organic creatures in 3D. Blender, free software, builds buildings and props as real 3D models, and Nemesis Desktop installs it if it is missing. Only your Claude or ChatGPT subscription is required.
What is the Trends tab?
A live view of what is working on Roblox: the games on the rise, their players, their curves over a day and a week, their votes, and an estimated Robux range. That range is an estimate from public figures, never a promise of earnings, for that game or for yours. The “Reproduce the game” button starts an original game of the same kind in your workspace: the name, the map, the models, the images, the sounds, the text and the code are made for you, nothing is copied.
Does Nemesis start from game templates?
No. Nemesis has no ready-made games and no template gallery: every game is built to measure from your own description, with its own art direction, its own world and its own systems. You describe what you want in your words, and you keep asking for changes until it is the game you had in mind.
How does Nemesis keep the result good-looking?
Three habits, built into every visual job. An art direction is written before building: a style chosen for your request, a palette, materials, lighting and a few hero pieces, with reference images drawn by ChatGPT when it is connected. Hero buildings are real 3D models made with Blender rather than stacks of blocks. And before saying “done”, a real screenshot is scored on a fixed grid, by ChatGPT as a separate judge when it is connected; below the bar, the gaps are fixed and the scene is scored again, up to three rounds.
Can Nemesis install things on my PC?
Yes, but only with your consent, like the Claude app, and only from a closed list of actions: install Blender or the Nemesis Studio plugin, set up, open or restart Roblox Studio, install Claude Code or Codex. Each request says what will be done, why, and what it changes; you answer “Allow once”, “Always allow” or “Deny”. With no answer, nothing happens. (The app itself is in French: the buttons read « Autoriser une fois », « Toujours autoriser » and « Refuser ».) An optional “Full control” mode, off by default, lets Nemesis work without asking, for one project or for all of them, after a warning that spells out the risk; a badge shows it at all times and one click takes it back.
Do I own the game? Can I make money from it?
The game is yours: it is built inside your Roblox Studio, under your Roblox account, and published by you. The code, the generated assets and the published experience are yours; Nemesis takes no cut and claims no rights over it. Roblox pays creators a share of what players spend in their game, through its official DevEx programme: cash-out opens at 30,000 earned Robux, converted at $0.0038 per Robux, and up to $0.0054 for spending by adult players in the United States. What your game earns depends on your game and its audience: nobody can promise you a figure, and we will not.
Do I need to know how to code in Luau?
Not to get a playable game. A little, if you later want to change precise rules yourself — and the code Nemesis produces is readable and commented for exactly that.
What is Luau?
Luau is the scripting language of Roblox, derived from Lua 5.1 with gradual typing and performance work by Roblox. Every Roblox game is written in it, and so is everything Nemesis writes for you.
Is Nemesis free?
No. Nemesis has no free tier: it is sold one way only, Nemesis Lifetime, a single payment of €97 at the launch price (€117 after the launch offer), with lifetime access and updates included. Nemesis then works with your Claude or ChatGPT subscription, within its usage limits: it pauses cleanly at a limit and resumes when the limit resets.
Does Nemesis work in English?
Partly. You can describe your idea in English, but the interface, the reports and the assistant's replies are in French today. An English interface is not available yet, and this page says so rather than letting you find out after paying.
Does Nemesis need my Roblox password?
Never. You sign in on Google's or Roblox's own website. With Roblox OAuth, Nemesis receives a token limited to identifying you and, if you allow it, adding generated assets to your inventory. With Google, it keeps no token at all. It cannot read your password and does not ask for it.
Which Roblox game genres can it build?
Obby, tycoon, simulator, horror, RPG, survival, racing, combat and PvP, tower defense, roleplay, farming and fishing, story and mystery, pets and collection — and hybrids. Nemesis starts from your description, not from a template.
Does the AI copy existing Roblox games?
No. When you name a known game or franchise, Nemesis takes inspiration from its mechanics and designs an original experience. It can reuse free kits that other creators publish in the Roblox library — generic systems, not a copy — but it never inserts the map, the characters, the music or branded assets of an existing game or licensed work.
Ready to see your game in Studio?
Get Nemesis, connect Studio, describe your idea, and let Nemesis build it.
Get Nemesis — €97One-time payment, no Nemesis subscription.