Resurrection of Evil - a computer game in the genre of a sci-fi first-person shooter, is an add-on to the original Doom 3. The add-on is installed on the original DOOM 3 and does not work without it.
The game takes place two years after the events of Doom 3 on an abandoned United Aerospace Corporation (UAC) station located on the planet Mars, where the action in Doom 3 took place. This addition does not change the game much, but only improves everything that was in the original.