Jagged Alliance is a very fun game if you like old school squad-based action that takes a good amount of skill and preplanning.
Upon starting, you create a character and have enough funds to hire a couple of mercenaries to accompany you on your missions. When recruiting, you can select whether you want a mercenary to join you for a day, week, or longer. You can also choose to outfit them with their preferred equipment, or equip them from your own stock. Each mercenary comes with a specialized role and relevant skills (+ equipment if you choose to pay for it).
I've played a lot of Fallout, especially Brotherhood of Steel, and I am fairly adept at those games.
In Wildfire, not so much.
Action points limit how far you can move/shoot, etc per turn, and fog of war prevents you from spotting any enemies outside of your party's field of vision. The feedback for weapon accuracy/chance to hit is very helpful, however, it should be noted that on Windows 7 and above you need to manually patch your game in order to fix the bullet drag animations (it is REALLY slow otherwise).
Aesthetics provide a good deal of nostalgia for veterans of older squad-based games, and the comments each mercenary makes when you are attempting to hire them adds nice flavor. The learning curve can be a bit rough if you are not already familiar with playing squad-based tactical games, and the tutorial definitely does not hold your hand. Character death is brutal, as there is no way to revive your downed teammates.
Character skill upgrading is pretty diverse, allowing you to completely remove skill from an area if you do not care about it (ex: putting first aid at "0" will effectively make your medkits useless).
Recommend giving it a try if you want a real challenge and do not care about dated graphics.