I haven't played much DoomRL under the current version, and I'm not too familiar with the new layout.
I was running a few AoPc games trying to get those lower badges(I have gold from a previous version where that only required completing AoPc), and ran into some trouble at Babel.
Is there a way to run past the Cyberdemon, like with the Bruiser Brothers? Is there a staircase I didn't find? Or do you have to be lucky enough to find an invulnerability powerup on the previous level, like with the old full wins? I had to drop my nuke and settle for Bronze, and I'd like to do better next time.