In this way Helgen will adapt to the game your playing act like a support mod to other Civilwar mods that you may have installed provided they do not edit the official Civilwar quests or Helgen. Regardless of which side you chose, Helgen will allow you to join the local garrison and do missions.
So if you choose to be Stormcloaks, Helgen becomes a Stormcloak town, if you chose the Empire, Helgen becomes an Imperial outpost. As you go through the Civl war quest line Helgen watches and updates it self according to your choices. Before you choose a side in the Civilwar, Helgen will appear as a functional Imperial miltary outpost with shops, mines you can own, hunting guilds and so forth. It adds a new singleplayer mini-campaign that kicks in once you enter Solitude for the first time.
Return To Helgen is a mod for The Elder Scrolls V: Skyrim created by Giskard.
