I remember this old gem....

(not my video)

It was fun to play. Aside from the fact that it is based off the musical, it was kind of an alt-take on the Martian invasion, where the initial Martian invasion was repelled at Woking Station, but the Martians prove immune to disease somehow. I loved it, although sadly at a certain part of each campaign (no missions, YOU decide where and when to attack) where the game would continuously crash and I had to restart the whole campaign.