Mount & Blade Warband is possibly the best game I have ever played on PC. It's a medieval fighter in which you can shoot arrows with a bow, ride horses, have sword duels and so much more.
Here is a gameplay vid: http://www.youtube.com/watch?v=D2jyywF-DwY
If you want to download the demo, it is on the same page as the full download.
Fire and Sword isn't as great as Warband, but for $5, I reckon it is worth it: http://www.amazon.com/dp/B004Y0F89U
And if you don't want multiplayer, then grab the original Mount and Blade: http://www.amazon.com/dp/B003INESJK
ALL GAMES ARE STEAM COMPATIBLE, as this link shows: http://forums.steampowered.com/forums/showthread.php?t=21019…
You add a fake US Address to you Amazon account, use this site to do that: http://www.fakenamegenerator.com/
Mod: Remove Affiliate Links
Shoot arrows… PUH.. Only pansies use arrows!
The tournaments are the best IMO - especially the free-for-all's. :D