Sorry for the double post, and also sorry, this isn't a steam key, instead, it is a gift code from GoG, so you'd need to be a member there to redeem this. Still, figured I should post it here, since this could be a general thread for this sort of stuff.
It is for Jagged Alliance 2: Unfinished Business. It is a standalone game (you don't need JA2 for it), more focused on combat, and less on the other stuff, and was slightly less well received than JA2, apparently. If you want it, here is the code:
REDEEMED
That was quick!