Answer by Marowi

You're on the right track.

You should probably do it less often than in every Update(), but FindGameObjectsWithTag will work. You then need to get the component (script) that the variable is in, using GetComponent, and then you can set it.

1. Gather array of all GameObjects tagged as "Enemy"
2. Use a forloop to iterate through all those gameObjects, and use GetComponent (or use Messages) to access the variable inside that script.

You just need to make sure that the variable you're declaring on those objects is publicly accessible (i.e. not in a function, and declared as public)