To import object animation, follow these steps:

1. Animate an object in a 3D package (translation, rotation, and scale animations are supported).
2. Import the object into Unity and select the Generic rig type.
3. You can adjust animation settings normally (loop an animation for instance).
4. Create an Animator Controller and drag and drop one of the imported animations into the Animator window to create a default animation state.
5. Place your animated object into a scene and assign the controller to the Animator component of the object.
6. If you run the game, the object will be animated.