You cannot actually cold start this level, so I made a mission to load it (the only difference is that the reactor has only few hit points...)
This level is hard. Drillers welcome you, and there are a few cloaked drillers too. You must know where they are, or they will fire at you till death. Also there are red hulks, you must push out of the way, to safely snipe the cloaked drillers, and you also need to be careful, with the green platformer camping up there...
Catching the cloaking device those cloaked drillers drop is risky. A lot of projectiles fired at you so must be quick to pick it up.
But the hard part is not ended here. You must be quick to hunt all strong enemies before they go roaming. You need to know the level well to accomplish this without too much problem...
There are also a lot of spawn points make sure not to trigger them. In the large open area with two yellow doors, coming from the yellow doors or the hostage area activates the matcens. In order to avoid this moved upwards after rescuing the hostages to avoid the trigger zone in front of the door.
This level took me quite a few attempts to finish. Fortunately there are quite a few shield spheres to recharge your health on.
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