Modders recently released a demo version of the Fallout: Chicago project. They invite players to immerse themselves in a post-apocalyptic version of Chicago, meet new factions, and complete quests:
You will have to unravel pre-war secrets, understand post-war politics between The Union Mob and Midwest Brotherhood, and face the dilemmas of other factions. Chicago is a dangerous place full of betrayal. Will you be able to complete your mission and get out alive?
The "Fallout Chicago Demo" mod for Fallout: New Vegas has already been published on Nexus Mods.
The demo version includes the first act, several side quests, houses for the player, dozens of weapon and equipment models, new enemies and a companion, as well as business mechanics.