3.5 mb of Javascript. Glug. Looks like just the game ui. I cannot really find references to DRM like the title says.

Lots of nice references to cheats though! They all rely on simcity.DEBUG being true,

  if (simcity.DEBUG)
      switch (a) {
      case scrui.kKeyCodeDigit1:
        c && (e && !d) && scrui.RunCheat("scgameui -unlockalltools");
        break;
      case scrui.kKeyCodeLetterW:
        c && (e && !d) && simcity.CreateUnit("T_RCI_AddHourlyIncomeCheat")
      }

Also pretty nifty: There's a rest api built into the game for communication, (as wel as websockets) and the name and email of one of the programmers are still in the code.

  simcity.TutorialFakeUserData.creator = {
    uri : "/rest/user/0",
    tutorialState : 1,
    id : 0,
    screenName : "Chet Keno",
    email : "mayorkeno@simcity.com",
    nucleusId : 0,
    lastLogin : 0,
    isOnline : "true",
    avatarImage :     "Graphics/Tutorial/tutorial_avatar_keno.png",
    cities_count : 1
  };

Also interesting is that it seems that this is not just a stripped v8 engine. There's things in the code that make me think the whole game UI is actually a pretty decent webkit engine:

  simcity.gEventManager = new simcity.cEventManger;
  simcity.gEventTypes = {
    CLICK : "click",
    MOUSEUP : "mouseUp",
    MOUSEDOWN : "mouseDown",
    MOUSEOVER : "mouseOver",
    MOUSEOUT : "mouseOut",
    ITEMSELECTED : "itemSelected",
    KEYUP : "keyup",
    KEYDOWN : "keydown",
    DATACHANGED : "dataChanged",
    HASHCHANGED : "hashChanged",
    GENERICEVENT : "genericEvent",
    SOCKETEVENT : "socketEvent",
    SOCKETCONNECT : "socketConnect",
    SOCKETDISCONNECT : "socketDisconnect"
  };
  simcity.SocketManager = {};
  simcity.cSocketManager = function () {
    this.mSocketListeners = [];
    this.mSocketRequests = [];

update: It could be leftovers, but this indicates that this is code from a prerelease/debug build.

    simcity.SetUpDemoScreen = function () {
      simcity.persistentLayout = gUIManager.LoadLayout("Layouts/PersistentPreAlpha.js", gUIManager.GetRootWindow());
      simcity.SetTextOnElement(simcity.DemoExitButtonTxt, new scrui.cLocaleString("Tutorials.json", "0x0eaf7bc9", "EXIT"));
      simcity.SetTextOnElement(simcity.DemoAvailableReleaseDateTxt, new scrui.cLocaleString("Tutorials.json", "0x0eaf7bb2", "AVAILABLE FEBRUARY 2013"));
      simcity.SetTextOnElement(simcity.DemoThanksForPlayingTxt, new scrui.cLocaleString("Tutorials.json", "0x0eaf7b4b",
      "THANKS for PLAYING"));
      simcity.SetTextOnElement(simcity.DemoPreOrderTxt, new scrui.cLocaleString("Tutorials.json", "0x0eaf7bb1", "PRE-ORDER AT SIMCITY.COM"));
      simcity.SetTextOnElement(simcity.DemoNotFinalSoftwareTxt, new scrui.cLocaleString("Tutorials.json", "0x0eaf7b3c", "Not Final Software"))
    };