Returning to the island paradise setting of the original Far Cry 3 is, for me at least, the best in the series by far. Having seen family members and friends captured by the psychotic pirate Vaas following an adventure holiday Jason sets out to get them back. Starting as a neutral figure, afraid to even fire a gun at first, he is quickly transformed by his experiences as the game progresses until pretty soon all manner of options are available to the player to best defeat his enemies.
Truth be told the actual story missions, while always passable and sometimes even inspired, are far from the most interesting aspect of the game. What truly makes Far Cry 3 special is the fantastic open world that allows for all manner of unique, and totally unscripted, events. Talk to anyone that has played the game and they will tell you of events that only they will have experienced. Fortunately the actual gameplay mechanics are also very good with weapons having a real sense of weight to them as well as the welcome freedom to choose from going in all guns blazing to taking a more stealthy approach thanks to the use of 'Takedown' moves that can be unlocked.
All in all this one comes highly recommended.