c# – Unity spawner position

You can generate random numbers using Random.Range().

However, it’s highly uncommon to use pixel values for positioning Game Objects in the world. Unity uses its own measurement: 1 unit in Unity is equivalent to 1 meter in the game world.

Still, if you insist on using pixels, you can translate that to world coordinates using Camera.ScreenToWorldPoint(). Note that the z value will have to go, as you can’t generate a 3-dimensional point on a 2-dimensional screen.

var x = Random.Range(-500, 508);
var y = Random.Range(-280, 290);

var screenPosition = new Vector2(x, y);
var worldPosition = Camera.main.ScreenToWorldPoint(screenPosition);

var enemyGameObject = Instantiate(Enemy, worldPosition, Quaternion.identity);

If those are not pixels but, in fact, very large world coordinate values, you can include the z value and skip the translation step.

var x = Random.Range(-500, 508);
var y = Random.Range(-280, 290);
var z = Random.Range(-374, 374);

var randomPosition = new Vector2(x, y, z);
var enemyGameObject = Instantiate(Enemy, randomPosition, Quaternion.identity);