Attack From Mars Cheats

Hold both flippers and the launch buttons for 15 seconds before pressing Start. This will let you enter Tournament Mode.

Shoot the ball on the Big-O-Beam ramp on the left and then press the launch button when you hear a cow. The second time you get Video Mode after this, you don't attack UFO's but cows.

When not actually playing the pinball game (by that I mean not having the ball going through the machine, the machine is just idle), press one of the flipper buttons and the machine will say something comical like ''Make me cookies!'' in a Martian voice.