

The entrance is down a small set of stairs, and the guard is usually found to the right of them. It is on Bismarck Ave., across the road from Cavity Lane in a Tattoo Parlor. The second shop is located in Chinatown, Algonquin. in Downtown Broker in an unknown dilapidated building, and first appeared in the mission " Do You Have Protection?", in which Dimitri directed Niko to purchase a Micro-SMG from the shop. The first shop is located on the corner of Dillon St. In Grand Theft Auto IV, they are accessible after the mission " Do You Have Protection?". There is one underground store located in each of the three main parts of the city. There are gun stores all over Liberty City. Players cannot enter the shops if they have a wanted level upon arriving at the door, it will be locked, and a message will come up, telling the player to lose their wanted level before they can enter. It also prevents the player from buying weapons from that shop again for a period of time, as the new clerk will begin shooting at the player with a Combat Pistol should they enter the shop again. Killing the owner of one of the shops results in the aforementioned guards armed with Combat Shotguns and SMGs attacking the player. Some pedestrians can be found at the entrance to the shop loitering casually, but they are actually guards who will defend the shop. Much like in Ammu-Nation stores from the 3D Universe games, if the player attempts to target or shoot at the store clerk, they will attack them and they might receive a wanted level for firearm discharge. Upon entering the premises, weapons are found placed on tables around the shop, and a small shooting range is found at the entrance. The gun shops are located underground in certain alleyways and are found in each of the main sections of Liberty City. This led to an opportunity for selling firearms illegally on the black market in Liberty City without a permit. Their absence is explained in a radio that the stores disappeared due to a crackdown on guns in the city by mayor Julio Ochoa (just like the current New York City) as an attempt to prevent crimes.

The Underground Gun Shops serves as the replacement of the Ammu-Nation featured in past games.
