Use the Force to get an extra 100,000 points
In the trench, you can use the force and get an extra 100,000 points by not shooting anything except the exhaust port. The text "USE THE FORCE" will be at the top of the screen until you shoot. The 100,000 is actually awarded just before you have to shoot the exhaust port, so it's possible to take out some of the gun turrets at the end, too. The bonus is lower on the first two waves.
Contributed By: TimeBelly.
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