Collision.gameObject

Description

The GameObject whose collider you are colliding with. (Read Only).

This is the GameObject that is colliding with your GameObject. Access this to check properties of the colliding GameObject, for example, the GameObject’s name and tag.

using UnityEngine;

public class CollisionGameObjectExample : MonoBehaviour
{
    //Detect collisions between the GameObjects with Colliders attached
    void OnCollisionEnter(Collision collision)
    {
        //Check for a match with the specified name on any GameObject that collides with your GameObject
        if (collision.gameObject.name == "MyGameObjectName")
        {
            //If the GameObject's name matches the one you suggest, output this message in the console
            Debug.Log("Do something here");
        }

        //Check for a match with the specific tag on any GameObject that collides with your GameObject
        if (collision.gameObject.tag == "MyGameObjectTag")
        {
            //If the GameObject has the same tag as specified, output this message in the console
            Debug.Log("Do something else here");
        }
    }
}