Okay, I'm absolutely loving this mapset. It's fraught with tension and dripping with atmosphere. It's incredibly dark, almost DOOM³ dark, especially when the Sector Light Mode is set to "DOOM" in GZDoom's options. In fact, I'm almost wondering if the game wasn't intended to be played this way, since it's almost impossible to see in some areas. But that just makes it even scarier, and makes it feel more realistic. I mean, if you're in a cramped, dungeon-like room with no outside light sources whatsoever, and the only lighting is some candles on the ground, it's going to be really freaking dark in there!
But I digress. As much fun as I'm having with this mapset (seriously, I am. Creepy levelsets are too hard to come by these days. DOOM has so much potential beyond just a lot of blazing gunfire and monster spam, and so few people seem to realize it), I'm also hopelessly stuck and entirely unable to obtain the blue skull key.
Any help? Even a clue would be nice, if you don't want to outright give the answer. I'm hoping I didn't mess up a script by doing things out of order or something. Considering that I beat the whole of Eternal Doom without any outside assistance, this is embarrassing!