with my own missions, the only ones that absolutely have to be played together are Atlas Affair part 1 and part 2, although arguably Dereliction Duty is part of that story arch (I tried to make it so playing it first wasn't absolutely required, although it is suggested). However, Perilous Prize is a standalone mission, even though it's in the same series.
Anyway, I just thought it might be worth mentioning that, in case you hadn't considered it. In any case, thanks for your effort.
I do have those connections noted regarding your missions, (which are also on The List), and I think that it's fantastic that you actually took the time to create two missions that are related to your 2-part series but can still be played out of context.
Right now, there is some discussion, (see above posts), regarding how to count a series in comparison to several standalone missions. What do you think?