1. Create an AnimatorController asset somewhere in your project and open it.
2. Create a state and assign the desired AnimationClip to it.
3. Assign the asset to the Controller field of the Animator component on your model.
4. Enter Play Mode and your animation will play.

1. Add a NamedAnimancerComponent to your model.
2. Add the desired AnimationClip to the Animations array of that component.
3. Enter Play Mode and your animation will play.

1. Write the script (see below).
2. Attach it to the model and assign the _Animator reference.
3. Create an AnimatorController asset somewhere in your project and open it.
4. Assign the asset to the Controller field of the Animator component on your model.
5. Create an Idle state and assign the AnimationClip to it. It will be the default state because it was created first.
6. Create an Action state and assign the AnimationClip to it.
7. Create a transition from Action to Idle and make sure its Exit Time is enabled.

using UnityEngine;

public class PlayOnClick : MonoBehaviour
{
  [SerializeField]
  private Animator _Animator;

  private void Update()
  {
    if (Input.GetMouseButtonDown(0))
    {
      _Animator.Play("Action");
    }
  }
}

It's also important to note that if you tell it to play (or cross fade) multiple animations in the same frame, it will only play the first one and ignore the rest. So if a character jumps (_Animator.Play("Jump")) and then gets hit (_Animator.Play("Flinch")) in the same frame, it will end up playing the jump animation.

1. Write the script (see below).
2. Attach it and an AnimancerComponent to the model and assign the references.

using Animancer;
using UnityEngine;

public class PlayOnClick : MonoBehaviour
{
  [SerializeField]
  private AnimancerComponent _Animancer;

  [SerializeField]
  private AnimationClip _Idle;

  [SerializeField]
  private AnimationClip _Action;

  private void OnEnable()
  {
    _Animancer.Play(_Idle);
  }

  private void Update()
  {
    if (Input.GetMouseButtonDown(0))
    {
      var state = _Animancer.Play(_Action);
      state.Events.OnEnd = OnEnable;
    }
  }
}

1. Select the character. The Inspector will show which Controller is assigned to the Animator.
2. Select the Controller and open it in the Animator window.
3. Select the Idle state. The Inspector will show which animation it is using.
4. Select the Action state. The Inspector will show which animation it is using.
5. Select the Action -> Idle transition. The Inspector will show its details.

1. Select the character. The PlayOnClick script's Inspector will show which animations it is using.

1. Select the character. The Inspector will show which Controller is assigned to the Animator.
2. Select the Controller and open it in the Animator window.
3. Open the PlayOnClick script.
4. It refers to the "Action" state, so go back to the controller and find the state with that name.
5. Examine the Action -> Idle transition to figure out what triggers it (Exit Time in this case).

1. Open the PlayOnClick script.

1. Duplicate the Animator Controller and assign it to the new character.
2. Change the animations (if desired).
3. Add the PlayOnClick script.

1. Add the PlayOnClick script.
2. Assign the animations.

1. Modify the PlayOnClick script as necessary to trigger the new action.
2. Find every object with that script attached and open their Animator Controller.
3. Go through them all and manually create the new state and any transitions it requires.

1. Modify the PlayOnClick script as necessary to trigger the new action.
2. Find every object with that script attached and assign the new animation in the Inspector.

1. Modify the PlayOnClick script to refer to the new name.
2. Find every object with that script attached and open their Animator Controller.
3. Go through them all and manually rename the state in question.

1. Modify the PlayOnClick script.
2. Add a [FormerlySerializedAs("_Action")] attribute to the field (using UnityEngine.Serialization;).