I dont't have a master plan for that either, but if you try to do it like joebarnin did with the screenshots (and maybe enhance the visibility and name exact locations if not clear to identify), that would be great.
Look out for:
floating objects
frobable items that cannot be frobbed or are difficult to frob
texture glitches
defective switches
defectives doors
weird AI behaviour (running against walls or other items, walking in circles, unable to operate doors, walking to close to walls and other things)
ambient sound/fx: too loud?
voices: clear and understandable?
Play style:
a. First run: It is a stealth, so try to sneak past all enemies and let me know if there are spots where you did not manage this or where you consider it extremely unfair. Check if the use of resources helps to ghost the mission or not and report if it does not.
b. Second run (if you have time for that): try to break the mission, play like a berserker, do things you should not do in a stealth game (or I did not foresee players could do), see how AI and environments react if you try crazy things, destabilize as much of the environment as possible and report if the results make the game unplayable.
hm...ja, something like that.
I confused Zerg Rush with another long time forum member that has a similar name and thus did expect he knows what to do...don't get me wrong, I am happy that he likes my mission...but this is not really helpful for beta testing.