Crypt of the NecroDancer

This achievement requires you to beat an All Zones Run with Nocturna in under 15 minutes, similar to the base game achievement for Cadence. However, I actually found this achievement to be easier than Cadence's despite the addition of Zone 5, simply because Nocturna starts with the cutlass instead of a dagger. It's two tile range and parry effect makes things so much easier in general for this run. It is worth keeping for the entire run, and potentially only swapping out for a stronger cutlass. The key here is to make a beeline for the stairs on every floor, only stopping at shops that are along the way and only stopping at a couple of them in general. Also, trapdoors are preferable, especially since the cutlass makes the miniboss rooms easy due to parrying. Although you can't be picky about your items, if possible, you'll want to grab a compass or a map as soon as possible to find the exits faster. I also found increasing your damage to be important to killing things quickly enough to get the achievement. In my successful run, I had a ring of power, but any damage boost is helpful. Also, if you see one of the square rooms with 4 crates/barrels, it is worth switching to the bat to break them for items. Often, you get good food items or even a map or other good equipable items. Hearts/Armor are essential to focusing on speed as well, because sometimes tanking hits is the fastest way to get through certain parts, especially the final bosses. The most important item to speed is bombs. This is solely because they make phase 2 of the Conductor fight go much quicker. Rather than having to focus on using the electricity on enemies, dodging attacks, etc. you can simply plop down 4 bombs and destroy 2 batteries at once. 12 bombs will make the phase trivial, but any number is good. I only went in with 4 bombs during my successful run, but they still helped out a ton.

This achievement will mostly come down to luck, however, between items, stair locations, etc. The main thing is that you'll just have to keep trying. This is greatly rng based unless you can make it through the whole run without good items. There is a decent amount of room for leeway, though. I got through this in about 14 minutes, with almost a minute of leeway, and I felt like I was going slowly at times during the run. If you go quick and get lucky, the time limit really isn't that bad, the challenge mostly comes from being underequipped in the later zones/bosses.