gistfile1.js

// namespace.js - first file you load...
(function (){

  var TIGERWORLD = {};
  window.TIGERWORLD = TIGERWORLD;

})();

// tiger.js - load this after namespace.js...
(function (TIGERWORLD){

  function Tiger (){
  
  }
  
  Tiger.prototype = ...
  
  // add your Tiger prototype to the GAEM namespace... 
  TIGERWORLD.Tiger = Tiger;

})(TIGERWORLD);

// run-the-game.js - load this LAST!
(function (TIGERWORLD){

  var tiger = new TIGERWORLD.Tiger();
  tiger.doExcitingThings();

})(TIGERWORLD);