Transformers: The Game

This achievement is actually fairly easy. Destroy the turbine in each tunnel, and drive back out of each tunnel as quickly as possible without using boost. During each escape, fire missles at the path in front of you to destroy the wreckage that you could get caught on. There is no need to drive recklessly, as you have plenty of time, and the flames you are escaping from don't really travel very quickly. Even without boost, you will quickly leave them behind. However, if you do get caught on the wall or wreckage, transform and move to the center of the tunnel, and then transform back and continue driving. Reversing wastes time. Also, pay attention to your health, and get the health cubes whenever you can. It's easy to die from damage on this mission when you are focused on other things.

Not as hard as it sounds but what you have to do is when you destroy the fans in the Hoover Dam and then drive as fast as you want but without using boost. The only tricky part is dodging the obstacles that collapse in front of you. What I did was when it came to the corners is too lightly let go of the accelerator because using the brake will slam you into a wall. If done correctly you should have a nice huge gap between you and the blaze before you get out. Remember not to use the Left Trigger (which is to boost).

Thanks to the dude who first commented.