I was suspicious of this title after noting that it was not, in fact, developed by the makers of the original game. My suspicions proved true, as it is not so much an expansion pack as an inordinately amateurish mod of the original game... its story claims to take place after the events of JA2, yet the scenes and dialogue are almost exactly the same, with a few characters inexplocably moved to new locations and deprived of the lines in which they hint at what you actually want to know! The enemies appear to behave much the same, except they now wear blue shirts instead of red ones -many harmless civilians do too, which is needlessly confusing to say the least!
Some of the weapon sprites and armor names have been altered to emulate the real world rather than the Jagged Alliance canon, for no apparent reason other than the developers' personal preferences...
A few things have been changed, and even if it's been years since you played JA2, or if you haven't played it at all, you will know which they are right away -mercs moved to the AIM alumni section with very poor-quality explanations, the top two mercs suddenly being two german gentlemen with unusually boring backgrounds, rebel leader Miguel's voice actor having been swapped out for a substantially less talented one so that his lines might be modified in just a few places to fit the "new" plot, and left the same as they were in the original game out of sheer laziness in other places, despite the fact that this mod claims to take place after JA2 rather than in some strange parallell universe as one might assume- the list goes on.
If you like Jagged Alliance or X-Com, do NOT buy this. Buy JA2, Unfinished Business, JA1 or Deadly Games -Sirtech, at least, know what they're doing!