Version: 2018.4
Unity User Manual (2018.4)
Unity User Manual (2018.4)

Unity User Manual (2018.4)

Use the Unity Editor to create 2D and 3D games, apps and experiences. Download the Editor at

The Unity User Manual helps you learn how to use the Unity Editor and its associated services. You can read it from start to finish, or use it as a reference.

If it’s your first time using Unity, take a look at the introductory documentation on Working with Unity, and see the Unity Tutorials.


Best practice and expert guides

Unity User Manual sections


Working in Unity

A complete introduction to the Unity Editor.


Unity 2D

All of the Unity Editor’s 2D-specific features including gameplay, spritesA 2D graphic objects. If you are used to working in 3D, Sprites are essentially just standard textures but there are special techniques for combining and managing sprite textures for efficiency and convenience during development. More info
See in Glossary
and physics.



The visual aspects of the Unity Editor including camerasA component which creates an image of a particular viewpoint in your scene. The output is either drawn to the screen or captured as a texture. More info
See in Glossary
and lighting.



Simulation of 3D motion, mass, gravity and collisionsA collision occurs when the physics engine detects that the colliders of two GameObjects make contact or overlap, when at least one has a Rigidbody component and is in motion. More info
See in Glossary



How to implement Multiplayer and networking.



Programming your games by using scripting in the Unity Editor.



Audio in the Unity Editor, including clips, sources, listeners, importing and sound settings.



Animation in the Unity Editor.



Cinematics in the Unity Editor, including cut-scenes and game-play sequences.



The Unity Editor’s UI system.



Navigation in the Unity Editor, including AI and pathfinding.


Contributing to Unity

Suggest modifications to some of the Unity Editor’s source code.


Platform specific

Specific information for the many non-desktop and web platforms you can make projects for with the Unity Editor.


Legacy topics

Useful if you are maintaining legacy projects.

Further sources of information

  • Unity Answers or Unity Forums - here you can ask questions and search answers.

  • The Unity Knowledge Base - a collection of answers to questions posed to Unity’s Support teams.

  • Tutorials - step by step video and written guides to using the Unity Editor.

  • Unity Ads Knowledge Base - a guide to including ads in your game.

  • Asset Store help - help on Asset StoreA growing library of free and commercial assets created by Unity and members of the community. Offers a wide variety of assets, from textures, models and animations to whole Project examples, tutorials and Editor extensions. More info
    See in Glossary
    content sharing.

Known issues

Is a feature not working as you expect it to? It might be an existing Known Issue. Please check using the Issue Tracker at

Unity User Manual (2018.4)
Unity User Manual (2018.4)