DiceHandler.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DiceHandler : MonoBehaviour {
    public GameObject Die;
    public float ThrowStrength;
    public int Count;

    public static DiceHandler Instance;

    public int TotalDiceValue {
        get
        {
            int total = 0;
            _dice.ForEach(die => total += die.GetComponent<Die>().FaceUp());
            return total;
        }
    }
    public int[] Faces
    {
        get
        {
            for (int i = 0; i < _faces.Length; i++)
            {
                _faces[i] = _dice[i].GetComponent<Die>().FaceUp();
            }
            return _faces;
        }
    }
    private List<GameObject> _dice;
    private int[] _faces;

    private void Awake()
    {
        Instance = this;
        _dice = new List<GameObject>(Count);
        _faces = new int[Count];
        for (int i = 0; i < Count; i++)
        {
            _dice.Add(Instantiate(Die, transform.position, Quaternion.identity, null));
            _dice[i].SetActive(false);
        }
    }

    private void cleanDice()
    {
        _dice.ForEach(die =>
        {
            die.GetComponent<Rigidbody>().velocity = Vector3.zero;

            die.SetActive(false);
            die.transform.position = transform.position;
        });
    }

	public void ThrowDice()
    {
        cleanDice();
        _dice.ForEach(die =>
        {
            die.transform.rotation = Random.rotation;
            die.transform.position = transform.position+ new Vector3( Random.Range(-.25f, .25f), 0, Random.Range(-.25f, .25f));
            die.SetActive(true);
            die.GetComponent<Rigidbody>().AddForce(transform.forward * (ThrowStrength * Random.Range(1f, 1.25f)), ForceMode.Impulse);
        });

    }

    public void ThrowDice(Vector3 origin, Quaternion rotation, Vector3 direction, float originRandomRange = 0f, float rotationRandomRange = 0f, float forceRandomRange = 0f )
    {
        cleanDice();
        _dice.ForEach(die =>
       {
           die.transform.rotation = rotation;
           die.transform.position = origin + new Vector3(Random.Range(-originRandomRange, originRandomRange), 0, Random.Range(-originRandomRange, originRandomRange));
           die.SetActive(true);
           die.GetComponent<Rigidbody>().AddForce(direction * (ThrowStrength * Random.Range(-forceRandomRange, forceRandomRange)), ForceMode.Impulse);
       });

    }


}

Die.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;



public class Die : MonoBehaviour {

    public AudioClip[] Impacts;

    private Vector3[] cubeFaces;
    private AudioSource audiosource;
    private void Awake()
    {
        audiosource = GetComponent<AudioSource>();
    }
    public int FaceUp()
    {
        cubeFaces = new [] { transform.up, -transform.up, transform.right, -transform.right, transform.forward, -transform.forward };
        float bestDot=10000;
        float dot;
        int faceUp = -1;
        //int faceUp = -1;
        for (int face = 0; face < 6; face++)
        {
            dot = Vector3.Angle(cubeFaces[face], Vector3.up);
            if (dot < bestDot)
            {
                bestDot = dot;
                faceUp = face;
            }
        }
        
        return faceUp + 1;  
    }

     
    private void OnCollisionEnter(Collision collision)
    {
        CustomEvents.OnDieCollide();
        if (Impacts != null)
        {
            if (audiosource)
            {
                if (!audiosource.isPlaying)
                {
                    audiosource.clip = Impacts.GetRandomElement();
                    audiosource.PlayOneShot(audiosource.clip, audiosource.volume);
                }
            }
            else
                AudioSource.PlayClipAtPoint(Impacts.GetRandomElement(), transform.position);
        }
    }
}