This game created a new genre, Native Warband is a bit rough around the edges, but If you download a full conversion mod or just an enhanced vanilla mod, it is one of the best games of all time. A true sandbox, and not like a bland Ubisoft game where you just clear outposts and climb towers to reveal the map, more like letting you play however you like and not giving you a central goal, but coming up with that goal on your own.
One of the greatest sandbox games ever made. The game sets the player loose and allows him absolute freedom in its world, allowing for an immersive, engaging and epic tale written by the player and the world around him. The modding scene also offers some great conversions of the game, from the world of the Song of Ice and Fire to the Lord of the Rings, and even original settings made solely for the game.