The Elder Gods were Great Old Ones who were more active in the universe, playing cosmic games with each other using the dimension known as the Board. (AUDIO: Gods and Monsters) The Elder Gods included the Animus, the Great Intelligence, the Karnas'koi, the Mi'en Kalarash, Derleth, the Celestial Toymaker, Fenric, Weyland, Moloch, Albert Marsden and Peggy Marsden, Ragnarok, To'Koth, and Ginny Greenteeth.
They were able to create time storms and lock away people's memories. An Elder God could not die in the normal universe, as the energies released would damage space and time. As the Seventh Doctor transported a dying To'Koth back to the Board, the Time Vortex itself was turned inside out. (AUDIO: Signs and Wonders)
- It's unclear if "Elder God" is actually a distinct group, or simply a synonym for Old One.