Require JS - Module for Backbone, Underscore and Jquery

RequireJsDefineBackbone.js

define(['jquery', 'underscore', 'backbone'], function ($, _, Backbone) {
    var initialize = function () {

        User = Backbone.Model.extend({
            initialize: function () {
                alert("New User " + this.get("name"));
            }
        });

        var user1 = new User({ name: "Mike" });


    };
    return {
        initialize: initialize
    };
});