Trenzalore is a planet added by Fallout Who Vegas. It is a planet in a state of constant battle between all major alien races of the universe. To reach Trenzalore the player must use drift flight to enter the Mutters Spiral, then travel to the coordinates (X:7,Y:9).
During the quest The Siege, the player gets the option to destroy Trenzalore, or to Time Lock it. In either event the battle ends and Trenzalore becomes unreachable in future.
Layout
The surface of Trenzalore is a medium sized arena, covered in scorched dirt and the remains of some spacecraft which have crashed there. The TARDIS lands on a small hill to one side of this arena which also contains the passage to the catacombs. Every 24 in-game hours, several groups of hostile aliens will teleport onto the planet's surface and begin fighting the player and each other. In the skies above Trenzalore, several spacecraft can be seen firing on each other and the planet itself, and the horizon of the surface is dominated by The Doctor's decaying TARDIS.
The catacombs underneath Trenzalore can be reached through the building on the hill on which the TARDIS lands. These catacombs are a large cave system which can be difficult to navigate, but they contain two additional locations. The first is the entrance to the decaying TARDIS. This is initially protected by a forcefield, which can be deactivated in the second location - a chapel to The Silence. When the player first enters this chapel, whether they are wearing an Eye Drive or not, the Silence will appear to the player and try to influence them into letting the war continue. If the player chooses to be influence they will be ejected from the chapel and unable to enter it again. If they refuse they will have to fight all the Silence in the room, but can then deactivate the forcefield leading to the decaying TARDIS.
The inside of the decaying TARDIS is a small room which closely resembles the Toyota Console Room. Instead of the central console, there is instead an open rift in time, which the player can interact with as part of The Siege.