I just played this, and WOW is it amazing. Visually it's probably the best mission I've seen. I loved the layout, the use of vertical space especially. The difficulty (I played on expert) was definitely challenging, but once you got a feel for the guards' patrols it was quite doable. I also didn't get put in a lot of "suprise! you're caught" moments opening doors, which I consider a major positive. You guys put a lot of detail and thought into every part of this mission, so congrats. My only real issue is how much back and forth there is, at least the first time around. It was patience sapping after a while: go to the gallery, see the door is stuck, go downstairs and start the generator, go back to the gallery, go back downstairs... stuff like that. I was stumbling around a bit, though I am not sure half of that's your faults, more like mine for not paying close enough attention to all the written clues. I also really liked the multiple approaches you can use for each room. At no point did this feel like a corridor level. The use of rafters was really well done. Lastly, I loved the attention to soundscape you guys gave to the external streets (as well as visual modeling). As soon as I started loading the map and saw the loading screen, I was sitting there wishing for that specific thing, that you'd make it feel like being in the middle of a city, and you did, almost perfectly!