DescentBB

I never managed to get there in time.. the whole maze is shaking after you blow up the reactor, it is hard to aim at the trigger..

Nothing great. You should probably get in before the reactor blows, though - yes it will probably require a guided missile to land it.

There are 2 switches (opens stuff, one switch is in small hidden room above the other switch) ... an invulnerability and a cloak. Other than the two large yellow bots back there ... not much (like he said).

Easiest way is to use the Vulcan to shoot through the grates before the reactor is blown. Besides the aforementioned you'll get energy and shield boosts as well as Smart Mines and Guided Missiles which might come in handy later.

This is one of the few levels where the designers forgot to remove some inaccessible cubes.