To kill off the computers aircraft, build a big hill at
the end of his runway and cover with lots of trees.

Nick Ray

When you rename a town rename it "Happy Town" it will give your town a good rating.

Pedrof

select make a railroad tunnel and go to an extreme and then make a tunnel with a value negative that you don�t have and that negative value will become positive

Bodo Felger

To kill buses of the computer, build a snakelike railroad over his road, put a train on it and see how his busses are shortly waiting and then be destroyed. Be warned: Use it only on roads, which YOU don't need, else you could loose your own buses, trucks...

davin

Go to the edge of the map and from the shore build a tunnel towards the other side of the map, and you will receive the amount of money it costs to build the tunnel you can get over $2,000,000,000.