"Call of Duty: Warzone" joined the battle royale ranks last season with a train full of loot. Season 6 will introduce Metro, Verdanisk's subway system.

Infinity Ward has confirmed that this is a functioning transportation system, allowing players to travel throughout the map to places such as the airport and the Tavolsk district as long as they are within the safe zone. Trains make regular stops around the map, clockwise and counter-clockwise, allowing for a bit of looting at the stations before boarding the train. The layout of each station is the same, so you will quickly learn the quirks.

See the Metro map here:

Unlike the loot trains, Metro trains are much stricter. Fights are not allowed, or else they will not move. If a fight breaks out on a train or platform, the train stubbornly refuses to depart, and no train will go to a station where there is a dispute; Infinity Ward calls this a "true safe zone" where one can take a breather, but this rule does not mean that fighting will not actually occur.

In the unlikely event that one is ambushed on the train or in the station, one can make a brave escape by running to the escape ladder, which is another exit to the surface. In other words, it is a great waiting place to catch anyone fleeing, or to open it and throw down a grenade. In fact, the place doesn't look very safe.

Warzone Season 6 will be available on September 29, and Infinity Ward has posted some tips that can be utilized when Metro is available.