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 5.3, see What’s New in 5.3 in this Manual.
For information about upgrading your Unity projects from older versions, see the Upgrade Guide in this Manual.
Specific information for the many non-desktop and web platforms supported by Unity.
For further guidance, please see:
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.
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.