Are you looking for a good game with good graphics, story, and gameplay? Go for Far Cry 3. I have played all the five parts and the primal one of Far Cry, but Far Cry 3 is by far the best one. Far Cry 4 is also close because of the better graphics and North-East India, Nepal-based storyline. The low-end requirements, good graphics, amazing story make far cry 3 probably the best game of this franchise.
Why Play Far Cry 3
The story starts with a cut scene showing a group of friends on an Island for vacation. They get kidnapped, and one manages to escape. The game is about him rescuing the others. There are many good NPCs, and the mythic touch to the game truly adds to its charm.