The Unity Editor enables you to create 2D and 3D games, apps and experiences. The Unity Manual helps you learn how to use the Unity Editor and its associated Services. You can read the Manual from start to finish, or use it as a reference.
For documentation on the newest features introduced in 5.5, see What’s New in 5.5 in this Manual.
For information about upgrading your Unity projects from older versions, see the Upgrade Guide in this Manual.
A complete introduction to the Unity software.
All of Unity’s 2D-specific features including gameplay, sprites and physics.
The visual side of Unity including cameras and lighting.
Physics in Unity, including working with rigid bodies and manipulating them in 3D space.
How to implement Multiplayer and networking.
Programming your games by using scripting in Unity.
Audio in Unity, including clips, sources, listeners, importing and sound settings.
Animation in Unity.
Unity’s UI system.
Navigation in Unity, including AI and pathfinding.
Our Services for making and improving your game.
Integration with VR.
Suggest modifications to some of Unity’s source code.
Specific information for the many non-desktop and web platforms supported by Unity.
For further guidance, please see:
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.
Everyplay documentation - a guide to the Everyplay mobile game replay platform.
Asset Store help - help on Asset Store content sharing.
Is a feature not working as you expect it to? It might be an existing Known Issue. Please check using the Issue Tracker at issuetracker.unity3d.com.