It is a sandbox-style game, set in the medieval-ish land of Calradia, where you begin with a lame horse, a rusty sword, a bent crossbow, and some tattered rags, and are then expected to impress a king of your choice and conquer the world for him (or whatever else you feel like, really).
Mount & Blade is an indie Action- Strategy RPG developed by TaleWorlds Entertainment and published by Paradox Interactive.