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THE COMPLETE GUIDE

How to make an open-world game: 67 steps from idea to release

The full production path for a solo creator aiming for AAA-level visuals in Unreal Engine 5, with Character Creator 5, Headshot 3, Blender and AI at every stage. Every step explains its terms in plain words.

Phase 1: Plan

A one-page design, a first mission and a costed asset list. Nothing gets built until these exist.

  1. Define the game in one paragraphDirector and designer
  2. Set the quality bar with referencesConcept artist
  3. Choose the first release's scopeDirector and designer
  4. Set the limitsDirector and designer
  5. Write the game's rules as observable behaviorDirector and designer
  6. Write the living-world rulesNPC and AI designer
  7. Choose an achievable first missionDirector and designer
  8. Make the asset listDirector and designer

Phase 2: Set up

A working Unreal project under version control, connected to Duke Forger.

  1. Get a capable PCTechnical artist
  2. Install the core softwareTechnical artist
  3. Create the Unreal projectTechnical artist
  4. Turn on the plugins this guide usesTechnical artist
  5. Organize and protect the projectTechnical artist
  6. Connect the project to Duke ForgerTechnical artist

Phase 3: Prototype with gray boxes

An ugly but complete game: start, play, win or lose, try again.

  1. Build a blockout test levelEnvironment artist
  2. Set up controls and cameraGameplay programmer
  3. Build the gameplay structureGameplay programmer
  4. Make one combat interaction workGameplay programmer
  5. Create one enemyNPC and AI designer
  6. Add success, failure and restartGameplay programmer
  7. Package a standalone buildTechnical artist
  8. Playtest the rough gameQA tester

Phase 4: Characters: CC5, Headshot 3 and Blender

Your hero, built from your own photos, playable in the prototype. The same pipeline then makes every other character and species.

  1. Photograph yourselfCharacter artist
  2. Generate your head in Headshot 3Character artist
  3. Build the body in Character Creator 5Character artist
  4. Create and fit the costume and gearCharacter artist
  5. Make the surface detailTechnical artist
  6. Make it game-readyTechnical artist
  7. Check the skeleton and skin weightsTechnical artist
  8. Create or obtain the animationsAnimator
  9. Give the face a performanceAnimator
  10. Connect the character to the gameGameplay programmer
  11. Build other speciesCharacter artist

Phase 5: Build the world from scratch

One region finished to the full quality bar, built from rules that can generate more.

  1. Start the world in World PartitionEnvironment artist
  2. Plan the map from the top downDirector and designer
  3. Make the terrainEnvironment artist
  4. Block out the worldEnvironment artist
  5. Give the ground real surfacesEnvironment artist
  6. Scatter nature with PCGEnvironment artist
  7. Build towns and cities from kits and rulesEnvironment artist
  8. Hand-build the hero locationsEnvironment artist
  9. Light the worldEnvironment artist
  10. Set up streaming and distanceTechnical artist
  11. Let AI agents build at your quality barEnvironment artist

Phase 6: A living population

Crowds where no two people look, move or sound alike, across species and languages.

  1. Build the seed cast for each speciesCharacter artist
  2. Generate variations from the seedNPC and AI designer
  3. Run crowds at scaleNPC and AI designer
  4. Give people daily livesNPC and AI designer
  5. Decide who speaks which language, and howWriter
  6. Give every species a voiceAudio designer
  7. Make faces talkAnimator
  8. Budget the live AINPC and AI designer

Phase 7: Audio and music

Music, effects and ambience that change with the world, every track legally cleared.

  1. Choose each track's source and record its licenseAudio designer
  2. Score by situationAudio designer
  3. Build adaptive musicAudio designer
  4. Add sound effects and ambienceAudio designer
  5. Mix itAudio designer

Phase 8: Vertical slice, then the AI expansion loop

A full-size game: one region finished by hand, the rest grown from it until every requirement is met.

  1. Build the interface and save systemGameplay programmer
  2. Finish the vertical sliceDirector and designer
  3. Turn your rules into numbersDirector and designer
  4. Run the expansion loopDirector and designer
  5. Expand the story with the systems that workWriter
  6. Retest the old after adding the newQA tester

Phase 9: Performance, testing, release

A shipped game and a way to keep it healthy.

  1. Measure and fix performanceTechnical artist
  2. Test the complete gameQA tester
  3. Prepare the releasePublisher
  4. Release and maintain itPublisher

Build these steps on your own game

Duke Forger turns this guide into a workspace with AI help and a check at every step.

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