Any of you guys ever find bugs before anyone else does? Like stumble across something before you read about it in a magazine or on the web?
A few I've found for Destroy all humans:
On the Rockwell level tractor the Ferris wheel with your ship, then knock it into buildings. If you do it right you can flip it onto the top of the ship and it will push you through the ground, then you can fly around down there. You can also do this with the Washington monument in the Capital City level.
The game crashes if you repeatedly stack vehicles between two tight buildings, like make a wall out of them, then take one Majestic car and throw it through them, like you're bolwing. Do it about twenty times.
The Robot general boss can be beaten by luring him into the hangar, where his own missiles kill him in a few seconds.
Stack cars in a pile over the landing spot, then land on top of them. Occasionally the cars will either pop through the saucer or you will beam down inside of the car and get stuck there.
You can occasionally get stuck inside of a tank by placing it on a gernade the running under it so it lands on top of you.
The final boss can be beaten easily by jumping over the surrounding fence and shooting her. She can't shoot through the fence. It's a cakewalk.
You can fire sonic booms at tanks and cars, then catch them on top of the saucer when they fly up into the air. This one is really hard to do.
Finally, on the Mr. Crypto Goes to Capital city mission, jump over the fence at the Octagon and trigger the cutscene , then go back to the gate and trigger the cutscene there. That resets the first cutscene, which you can watch again.