It appears that there are doors with no keys that are required to finish. The first time was obvious because there was only 1 room and 2 guards. One had a key that didn't open the door, and the room was easy enough to search and had nothing else in it. Luckily it was a wooden door that could be bashed, but I was worried right off the bat. You usually aren't forced to bash a door in a stealth game.

After clearing the mission there were still 2 steal doors that were locked and no keys to go to them. Based on other comments this appears to be a bug (but lets call it poor/untested mission design). I don't believe they were cleverly hidden as nothing is clever about this mission and I already put more time in trying this mission out than the author did in building it. I'm generally very appreciative of people's time and sharing their work, but this doesn't appear it was even run through in Dromed after building it.

This mission was rudimentary, square, undecorated design. Torches were burning their flames into the ceiling. Carpet texture was made from banners with a very deep texture brush in one hall.

There was a random triangle tooth lockpick floating off the ground in the hallway even though I already started witth one. Now I have 2 and neither work on any door.

You can walk through barrels and crates are sunken into the floor.

Filing this one under, not playable due to design.