Nuclear Defence

You have been sailing in the Atlantic Ocean for three weeks now and you are desperate to understand why you are there: nothing on the horizon, no mission order! .. All you know is that your permission has given you well been "sweet"; I do not think that you are present as Saint-Bernard for the trimarans, not a building like the FALCON! So think ... the latest addition to the nuclear defense detachment! Suddenly, the radio brings you a coded message ... surely an action that is preparing! Indeed, the political tension reigning in the world has gone up a notch (if ... it is possible) and your mission order is concise, clear, neat and Drécis:

Defend and protect your cities.

Attack and destroy enemy ships.

Attack and destroy ALL enemy cities.

There is not a minute to lose: checking the engines, full of fuel and: "Machines, let's go ahead! ..". First, you look at the general situation of enemy ships and cities as well as the positions you will have to defend. For the moment, everything is calm, so you are heading towards the first city which will be your victim ... There you are, you are ready to attack with your guided missiles; For the destruction to be total, you have three strategic points to reach: the fuel tank on the roof of the building on the left, the bridge over the estuary and the computer room of the skyscraper, on the right. But, what's going on? .. You've triggered a response, and a countdown tells you how much time you have left to "rescue" you. one of your cities that is going to be attacked! Quickly !