Selection.objects

Description

The actual unfiltered selection from the Scene.

Only objects from the Scene or Hierarchy will be returned, not from the Project View. You can also assign objects to the selection. See Also: Selection.instanceIDs.
Scriptable Wizard that lets you select GameObjects by their tag.

class SelectAllOfTag extends ScriptableWizard {
    var tagName = "ExampleTag";

    @MenuItem ("Example/Select All of Tag...")
    static function SelectAllOfTagWizard() {
        ScriptableWizard.DisplayWizard(
            "Select All of Tag...",
            SelectAllOfTag,
            "Make Selection");
    }

    function OnWizardCreate() {
        var gos: GameObject[] = GameObject.FindGameObjectsWithTag(tagName);
        Selection.objects = gos;
    }
}