K9: Deja Who was an online game based on Doctor Who, released to the BBC website. It allowed the player to take control of K9 and play missions based on several episodes of the first two series of the revival, namely "Rose", "The End of the World", "World War Three", "The Empty Child", and"New Earth", in the Doctor's stead.
- Boss Battle: Auton Mickey in "Rose" and the Slitheen Leader in "World War Three".
- Mooks: In "Rose", Autons take two hits to defeat and walk along a set path.
- Elite Mooks: Auton guards take five hits to defeat and actually shoot at K9.