If you like your videogames to include beheadings, or just to have a sheen of medieval multiplayer blood-letting, then you could do far worse than a game of Chivalry, the Kickstarted-formerly-a-mod game from Torn Banner. Those handsome devils have had quite the hit on their hands, and seek to capitalise on it with an expansion called Deadliest Warrior. Sounds a bit like reality TV, yes, but actually it's a sort of time-and-space spanning archaic warrior toolkit, with "five new warrior classes from different lands and times, unique weapons, combat techniques, game modes, customization options, and themed battlegrounds". Sounds hairy, and it will come out swinging on November 14th, with a closed beta for pre-orderers happening from today.
More provocatively, perhaps, there's a free weekend for the original on Steam right now.