Tube Map Trophy in Dying Light 2 Stay Human
Activate all Metro Stations.
How to unlock Tube MapThere are 9 Metro Stations in the game, a couple of them will automatically be activated but for the others you'll have to enter them and activate the power. Most of the time you'll have to go in a lower area inside the metro and find 4-5 switches that you'll need to reactivate.
Most of the Metro will be best to be done at Night time because there will be many zombies inside during the day but some of them will be controlled by Renegades so it doesn't matter when you do them, you'll have to deal with the renegades first though.
See Pilgrim's Path for some maps with their locations, represented by this icon: