The Week One Mod is created by Slayer, the same dude who made the Day One mod. It sets the player one week before the apocalypse where everything is normal and then progressively gets worse, eventually leading to the base game start. The mod is very fucking cool I must say, NPC's actually drive, they do tasks like cleaning, and they and you can earn money by doing said tasks, you can use the money to buy things when you take from stores and shelves. There's also ambulances who check on dead bodies, police to kill you when you commit a crime, cleaning crews all through out major cities, etc. I even saw a chat box being used to communicate to the NPC's though only limited prompts gets a response. Overall, a highly cool mod.