Mount and Blade is a 3D, open-ended, single-player, third- or first-person, computer role-playing game, created and distributed by the Turkish development house TaleWorlds. Mount and Blade has a medieval setting, without any fantasy elements. Mount and Blade is notable for its emphasis on realistic cavalry combat, which was common in the era, but is largely absent in most RPG titles.

X4VI3R says

9/10 - Agree (10) Disagree

Now that Warband is out there, i can't just forget the good old M&B.
With it's unique style, this game provided more than five years of the best medieval-style RPG, only to be bested by M&B Warband.
Realistic.
Detailed.
Moddable.
What more can be asked?