Fixed #939.

app/lib/LevelLoader.coffee

@@ -73,32 +73,33 @@ module.exports = class LevelLoader extends CocoClass
     else
       @level = @supermodel.loadModel(@level, 'level').model
       @listenToOnce @level, 'sync', @onLevelLoaded
-      
+
   onLevelLoaded: ->
     @populateLevel()
-      
+
   populateLevel: ->
     thangIDs = []
     componentVersions = []
     systemVersions = []
     articleVersions = []
-    
+
     for thang in @level.get('thangs') or []
       thangIDs.push thang.thangType
       for comp in thang.components or []
         componentVersions.push _.pick(comp, ['original', 'majorVersion'])
-        
+
     for system in @level.get('systems') or []
       systemVersions.push _.pick(system, ['original', 'majorVersion'])
       if indieSprites = system?.config?.indieSprites
         for indieSprite in indieSprites
           thangIDs.push indieSprite.thangType
-      
+
-    for article in @level.get('documentation')?.generalArticles or []
+    unless @headless
-      articleVersions.push _.pick(article, ['original', 'majorVersion'])
+      for article in @level.get('documentation')?.generalArticles or []
+        articleVersions.push _.pick(article, ['original', 'majorVersion'])
 
     objUniq = (array) -> _.uniq array, false, (arg) -> JSON.stringify(arg)
-      
+
     for thangID in _.uniq thangIDs
       url = "/db/thang.type/#{thangID}/version"
       url += "?project=true" if @headless and not @editorMode
@@ -117,14 +118,15 @@ module.exports = class LevelLoader extends CocoClass
       url = "/db/level/#{obj.original}/version/#{obj.majorVersion}"
       @maybeLoadURL url, Level, 'level'
 
-    wizard = ThangType.loadUniversalWizard()
+    unless @headless
-    @supermodel.loadModel wizard, 'thang'
+      wizard = ThangType.loadUniversalWizard()
+      @supermodel.loadModel wizard, 'thang'
 
   maybeLoadURL: (url, Model, resourceName) ->
     return if @supermodel.getModel(url)
     model = new Model().setURL url
     @supermodel.loadModel(model, resourceName)
-    
+
   onSupermodelLoaded: ->
     @loadLevelSounds()
     @denormalizeSession()
@@ -216,4 +218,4 @@ module.exports = class LevelLoader extends CocoClass
 
   # everything else sound wise is loaded as needed as worlds are generated
 
-  progress: -> @supermodel.progress
+  progress: -> @supermodel.progress

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