Open-world games give players the freedom to explore, interact with unique NPCs, and uncover hidden stories. But building one from scratch usually requires a ton of code.
Unless you’re using Rosebud AI.
With Rosebud, you don’t just code—you vibe code your world into existence using AI.
In this tutorial, we’ll break down how a 3D AI open-world game was built and how you can create your own using Rosebud AI.
Example: Waterworld – A 3D Open World Game Vibe Coded with AI
One stunning example of an open-world game created with Rosebud AI is Waterworld. This game features a vast oceanic world, dynamic AI NPCs, and interactive wildlife—all vibe coded using AI-generated prompts.
From procedural terrain generation to AI-driven NPC conversations, every element in Waterworld was crafted using Rosebud’s powerful AI.
Let’s break down how you can create something just as immersive with Rosebud AI.
Step 1: Vibe Code the Basic 3D Scene
Start by asking Rosebud AI to set up your basic 3D environment. You can start with prompt like this one:
"Create a procedurally generated terrain with hills, mountains, grass, dirt, and snow areas for a 3D open-world game. Add vegetation like trees, flowers, and grass patches."
Rosebud AI instantly spins up a fully interactive world complete with realistic terrain, lush vegetation, and varied biomes.
Your world is now ready for exploration!
Step 2: Populate Your World with Interesting NPCs
No open-world game is complete without interesting characters.
With Rosebud AI, you don’t just create NPCs—you can craft entire personalities. Let’s spawn a merchant NPC named Finn:
"Add a merchant NPC named Finn. Make him friendly and helpful, offering brief trading interactions to players."
Rosebud does the heavy lifting, providing the movement and even interactive dialogue prompts—all handled seamlessly behind the scenes.
Repeat this process for as many NPCs as you want.
Step 3: Adding Unique Creatures: The Ancient Squid
Now, let’s spice things up.
What about a mysterious creature lurking beneath your game’s waters? Use this prompt:
"Make an NPC named 'The Ancient One', an Ancient Squid character that swims around mysteriously, responds cryptically, and hints at ancient ocean secrets."
Rosebud instantly generates not just the squid’s mesh with flowing tentacles but also AI-driven dialogue that enriches player interactions with deep sea metaphors and cryptic hints.
Step 4: Creating a Playable Character
A game world isn’t complete without a player character.
With Rosebud AI, you can generate a main character with simple instructions:
"Generate a playable character with smooth movement, jumping mechanics, and third-person camera controls."
Rosebud handles all the movement logic, collision detection, and animations, so you can focus on designing your world instead of debugging physics.
Step 5: Enhancing Immersion, Dynamic Water and Lighting
To achieve immersive vibes, Rosebud AI helps you craft stunning visuals effortlessly:
"Add realistic water with gentle waves and reflections."
"Make a day-night cycle with dynamic lighting and soft shadows."
With these simple prompts, Rosebud creates a fully dynamic environment where the world feels alive.
Step 6: Interactive Gameplay with Chat Systems
Let’s make your NPCs truly engaging by allowing players to interact with them.
You don’t need to manually program dialogue trees—just prompt Rosebud:
"Add NPC dialogue interactions where players can ask questions and receive unique responses based on the character's personality."
NPCs will now respond naturally, creating deep and engaging player interactions without any additional work from your side.
Final Touches: Vegetation & Details
Your world wouldn't feel alive without vegetation. Instead of manually placing assets, just use a single prompt:
"Add dense forests, scattered flowers, and grassy fields."
Rosebud AI handles the rest, ensuring the landscape feels organic and immersive.
Wrap-up: Your 3D World, Powered by Rosebud AI
You’ve just vibe coded a stunning, open-world 3D game experience—complete with interactive NPCs, mysterious sea creatures, dynamic terrain, and realistic animations—all without writing lines of complex manual code.
Rosebud AI makes creating your open-world games simple, fun, and totally accessible.
If you want to vibe code the open-world adventure you've always dreamed of but are not sure how to start, join our Discord and interact with our community of creatives.