Can't figure out my collision mistake, please help!

I'm afraid this didn't do it for me. I've tried loads of combinations according to the collision action matrix and none of them seem to be working for me. It feels like I'm missing something obvious, as the projectile seems to just pass through the player no matter what I set them to. I've tried both rigidbodies, both triggers, both non-trigger (static) and no luck.

In the code you provided you don't call the OnCollisionEnter() function. I suppose you have it somewhere in your code? Just making sure.

I didn't think I needed a OnCollisionEnter function if I was using hit.transform.tag? Here's the full script ($$anonymous$$us the variable declarations) for reference, it's actually part of a tutorial series that I've followed to a T, but the collider issue seems to persist:

 using UnityEngine;
 using System.Collections;
 
   
     // Use this for initialization
     void Start () 
     {
         myTransform = transform;
         
         //As soon as the projectile is created start a countdown
         //to destroy it.
         
         StartCoroutine(Destroy$$anonymous$$yselfAfterSomeTime());
     }
     
     // Update is called once per frame
     void Update () 
     {
         //Translate the projectile in the up direction (the pointed
         //end of the projectile).
         
         myTransform.Translate(Vector3.up * projectileSpeed * Time.deltaTime);
         
         
         //If the ray hits something then execute this code.
         
         if(Physics.Raycast(myTransform.position,myTransform.up, out hit, range) &&
            expended == false)
         {
             //If the collider has the tag of Floor then..
             
             if(hit.transform.tag == "Floor")
             {
                 expended = true;
                 
                 
                 //Instantiate an explosion effect.
                 
                 Instantiate(blasterExplosion, hit.point, Quaternion.identity);
                 
                 
                 //$$anonymous$$ake the projectile become invisible.
                 
                 myTransform.renderer.enabled = false;
                 
                 
 
             }
             
             
             
             if(hit.transform.tag == "BlueTeamTrigger" ||
                hit.transform.tag == "RedTeamTrigger")
             {
                 
                 expended = true;
                 
                 //Instantiate an explosion effect.
                 
                 Instantiate(blasterExplosion, hit.point, Quaternion.identity);
                 
                 
                 //$$anonymous$$ake the projectile become invisible.
                 
                 myTransform.renderer.enabled = false;
                 
                 
 
                 
                 
                 //Access the HealthAndDamage script of the enemy player
                 //and inform them that they have been attacked and by whom.
                 
                 if(hit.transform.tag == "BlueTeamTrigger" && $$anonymous$$m == "red")
                 {
                     HealthAndDamage HDscript = hit.transform.GetComponent<HealthAndDamage>();
                     
                     HDscript.iWasJustAttacked = true;
                     
                     HDscript.myAttacker = myOriginator;
                     
                     HDscript.hitByBlaster = true;
                 }
                 
                 if(hit.transform.tag == "RedTeamTrigger" && $$anonymous$$m == "blue")
                 {
                     HealthAndDamage HDscript = hit.transform.GetComponent<HealthAndDamage>();
                     
                     HDscript.iWasJustAttacked = true;
                     
                     HDscript.myAttacker = myOriginator;
                     
                     HDscript.hitByBlaster = true;
                 }
             }
             
         }
     }
     
     
     IEnumerator Destroy$$anonymous$$yselfAfterSomeTime()
     {
         //Wait for the timer to count up to the expireTime
         //and then destroy the projectile.
         
         yield return new WaitForSeconds(expireTime);
         
         Destroy(myTransform.gameObject);
     }
 }
 
 
 
 
 
 
 
 
 

Does it explode and get invisible if you hit the ground?

It does, yes.