Unity 2D

Sprites : Graphic Objects in 2D are called Sprites Unity has a sprite editor, which can be used to extract sprite graphics from larger image. Example: You can extract arms, legs etc as separate element from 1 image.

Sprites are redered with a sprite renderer. It can be added to GameObject via the Components menu

Unity also provides with a physics engine for 2d games. Some Physics components are Rigidbody2D, Box collider2D, HingeJoint2D.