"We must destroy the pods and reverse the beams before Davros turns the Earth into a Dalek production planet!!!"

TV The old PC game Dalek Attack available for download:

"The premise is a very simple and easy one. You have the evildoer who wants to conquer the world and you, as a good guy, must prevent it. The twist is the typical Dr. Who plot. Davros is trying to turn Earth into a Dalek production planet (destroying humanity as a side effect). In order to stop him you need to run to the police phone booth and travel back in time, to the point when the invasion began and prevent it."

Well, it is the Seventh Doctor. It's particularly amazing that someone thought this release was a good idea nearly five years after the show was canceled. At least it features a version of the diamond logo. All good fun (ish).