Fixed #939.

app/lib/LevelLoader.coffee

@@ -94,6 +94,7 @@ module.exports = class LevelLoader extends CocoClass
         for indieSprite in indieSprites
           thangIDs.push indieSprite.thangType
 
+    unless @headless
       for article in @level.get('documentation')?.generalArticles or []
         articleVersions.push _.pick(article, ['original', 'majorVersion'])
 
@@ -117,6 +118,7 @@ module.exports = class LevelLoader extends CocoClass
       url = "/db/level/#{obj.original}/version/#{obj.majorVersion}"
       @maybeLoadURL url, Level, 'level'
 
+    unless @headless
       wizard = ThangType.loadUniversalWizard()
       @supermodel.loadModel wizard, 'thang'
 

app/lib/simulator/Simulator.coffee

@@ -56,7 +56,7 @@ module.exports = class Simulator extends CocoClass
     @god = new God maxWorkerPoolSize: 1, maxAngels: 1  # Start loading worker.
 
     @levelLoader = new LevelLoader supermodel: @supermodel, levelID: levelID, sessionID: @task.getFirstSessionID(), headless: true
-    @listenToOnce(@levelLoader, 'loaded-all', @simulateGame)
+    @listenToOnce(@supermodel, 'loaded-all', @simulateGame)
 
   simulateGame: ->
     return if @destroyed