GUIDE

How to make a game like GTA by yourself

GTA is made by hundreds of people over many years. You can still make an open-world crime or adventure game alone, if you make it the way studios do: plan tightly, prove the fun with gray boxes, finish one district to full quality, then grow the world from that standard.

The biggest difference today is AI. Procedural generation fills streets with buildings and props by rules you set, character tools build realistic people from photos, and AI agents can lay out districts in a sandbox copy of your project for you to approve. You still make every creative decision.

The steps

1. Step 1: Define the game in one paragraph

   Write who you play, what you do, what you want and why it is interesting. This paragraph is the compass every later decision is checked against.

2. Step 3: Choose the first release's scope

   Decide the platform, single-player or multiplayer, camera and length. Multiplayer changes how every system and save works, so it is decided now, not later.

3. Step 7: Choose an achievable first mission

   One small area, your character, one weapon, one enemy type, one objective and an exit. A complete loop you can finish before anything gets bigger.

4. Step 15: Build a blockout test level

   A blockout is the level made from plain boxes. You settle room sizes, door widths, jump distances and routes now, while changing them costs nothing.

5. Step 21: Package a standalone build

   Packaging turns the project into a game that runs outside the editor. Working in the editor does not prove the packaged game works, so you do it now and after every milestone.

6. Step 34: Start the world in World Partition

   World Partition splits the map into cells and loads only what is near the player. Turn it on from day one, because converting a world later is painful.

7. Step 41: Hand-build the hero locations

   Landmarks, mission spaces and story interiors are where players look closest, so you build these yourself.

8. Step 45: Build the seed cast for each species

   Make 6 to 10 base heads and bodies per species covering age, build and sex, plus a modular wardrobe. This is the bare minimum the variation system needs.

9. Step 59: Finish the vertical slice

   One region with final graphics, controls, combat, population, audio and interface working together. Everything later is measured against it.

10. Step 61: Run the expansion loop

    Each pass measures the gap, builds new content from your approved kits in the Sandbox, checks it automatically, shows you before and after, and merges only with your approval. It stops when every requirement is met.

Common questions