This is a paid asset, but now you can download Destructible objects script for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Destructible objects script v1.0
* It’s not a real-time destructible script, this asset works with prefabs. Voronoi free plugin is used for creating destructible prefabs. Destructible objects script – universal optimised script with which you can make your own destructible objects in your game.
It will be perfect for various game genres (from racing games to shooters).
Different settings and adjustments give an opportunity to make destructions realistic.
In each object collision force, health, explosion force, collision sounds, breaking sounds, cleanup broken objects, break delay, collision prefabs, broken prefabs can be adjusted.
This script supports kinematic rigidbody and broken objects reappearing functions.
Also this asset is perfectly suitable for mobile games.