This quickstart guide is for 2D game developers who want to create a 2D game in Unity. You can create several different types of 2D games with Unity. You can read this guide from end to end, but note that some sections are more relevant for 2D games with certain game perspectives and art styles.
Note: This guide applies to all versions of Unity from 2019 LTS upwards.
For detailed 2D game tutorials, see the following Unity Learn materials: