Black & White vs Mount & Blade
Black & White
Black & White is a god-mode simulation game (a.k.a. God game) where players are casted into the role of an almighty god who is able to control the fate of an entire world and yet is dependant on the prayers of your subjects in order to increase your power. You can opt to be a merciless or a benevolent god but regardless of your choices, challenges will eventually arise and you will need to do what it takes to keep worships coming in.Unlike most sandbox games where you can control every single thing built, you can't really force your people to do as you as directly, but you could encourage them indirectly... and this is exactly what makes Black & White such a hit back in the day - a game concept that no one has ever experienced before. Unfortunately, it seems like this game won't be brought back soon and unless you managed to get a old hard copy of the game (and of course, make it work on your much more advanced PC), you may never get to play this game.
Mount & Blade
Mount & Blade is the first game in a highly popular game franchise that boasts of being an RPG with one of the most sandbox-like gameplay ever. In this game, you can play as anyone you like be it a lone adventurer, a military commander or even the "mayor" of a small town in Calradia. The game also provides a rich and open world, allowing you to travel anywhere you like and discover all manner of points of interest ranging from farm villages to massive castles. You even have the freedom to interact with hundreds of characters, some of which will likely be hostile towards you. Due to this, the game provides you with an intuitive combat system that includes both sword-fighting and fighting on horseback that you can use to dispose of the hostile.Mount & Blade is an old game, and as such, its graphics may be a bit dated and its controls feel rather clunky. Thus, the game by itself might not be worth the money, but if you can get it along with Mount & Blade Warband or Mount & Blade With Fire and Sword - the two other and much better games in the series, then it'll be worth getting it.