Chapter 10: The Finale - Oscillator Bombing Run
You can collect all four minikits in story mode in this area.
A number of green turrets pepper the walls at the start of the area. Shoot five of them for a minikit.
Follow the twists and turns until you spot a couple of tremendous turbine blades up ahead.
The minikit is floating next to the last one.
When you get out into space, do the timed-run to be awarded the next minikit.
At the end of this area, you have to decimate some glowing red pipes, which is definitely going to cause a problem for someone.
As you fly the same lap over and over, shoot three of the red sigils to earn yourself a minikit.