Torn Banner Studios, makers of Age of Chivalry, a free game modification on Valve's Source engine(Half-Life 2), is set to release Chivalry: Medieval Warfare this month on the 16th. Chivalry uses Epic Games' Unreal Development Kit and looks stunning.

There really isn't much to say, as far as I'm concerned, this is the only game that matters.

http://www.ChivalryTheGame.com/