I was thinking of getting a Jagged Alliance game, and since I don't want to spend much on a series I'm not at all familiar with, I looked for a game that costs 3 dollars. JA2: Wildfire seemed good enough, but the top review is troubling.
So... is it really that bad? Should I get JA2: Unfinished Business instead?
Get Jagged Alliance 2, play through it, then grab the 1.13 mod, which should allow you to play JA2:UB as well, and you should be able to add the Wildfire additions to it as well.
As for the "Steer Clear" review, it is more or less correct, though the "amateurish mod" is debateable. JA2:WF has different maps from JA2 (a godsend if you're bored of playing the same maps over and over, but JA2 1.13 includes them), more weapons (JA2 1.13 includes them), a few more mercs (JA2 1.13 includes them, and a few more as well), higher resolution support (JA2 1.13 supports them), bigger merc teams (JA2 1.13 supports them), increased difficulty compared to JA2 (JA2 1.13 has many more customizations for the difficulty, so you can better tweak it) and possibly one or two other things that I can't recall atm.
On to JA2:UB now. While JA2 was a more or less sandboxy game, since you could decide in which order to attack the sectors, and what to do with your time there, JA2:UB is more or less a sequence of sector assault on sector assault, and thus far more combat oriented. It does have the benefit of having a campaign editor supplied, and quite a few campaigns exist for it, but as I said, JA2 1.13 supports most of them by now.