Chivalry and War of the Roses are the two biggest, most polished medieval combat games out there. I must say Chivalry takes the cake. It's not a flawless victory, but the game really delivers a sense of realism and almost an artisitc fighting style. That being said, wait until it's on sale on Steam before buying. I believe $25 is a little too much, but $10 is great.
Chivalry only has 4 classes, however you can make three selections of weapons/shields within each class. For example, an Archer can either take a bow, crossbow, javelin, or sling rocks. Then his sidearm could be a dagger or short sword. Finally either a shield or .. Well another shield. There isn't a TON of variety here, but it's got enough to keep you entertained for a few days. Personally I enjoy being an Archer and using javelins. They can be used as a regular stabby weapon as well so I'll poke someone and when his friends come, I'll run and try to throw my javelin into their nose. The toe-to-toe classes are fun too but it IS a pretty hard learning curve. However once you get the basiscs down, the game works as intended ("Inspired from the intensity and epicness of swordfighting movies such as 300, Gladiator and Braveheart.")
The game modes are well above-average too, Counter-Strike style rounds, a TDM, 1v1, Team Objective, and Kill the King. Trying to kill the King is really when the game shows its stuff. Raiding the castle shows the beauty of the graphics and well as the mechanics when you step into a 2v1. You see blacksmiths hammering swords, and commoners hiding in corners. It really creates one of those moments hardcore gamers look for, when even if only for a little bit, you are living the game. Until some tard on your team swings and takes your head off. Oh well. Dueling wasn't my cup of tea at first however 60% of the time, fighting is 1v1, so it really is important, especially to learn how to fight each class. After a while I just embraced it and it's actually kind of fun.
Overall, this game is the best in its genre. But like I said, for the price $25 is a little high. It's a well made game, great concept, kudos on a nearly flawless mechanics (and it's uber hard to meet that challenge), but lack of variety in the classes, and to a degree the community take away from this game. You will probably play for a few days, then move on. I can't play more than a round with each class before I'm just over it. If you're playing on a realistic server and FF is on, I can almost promise someone will just be sitting in your spawn TKing your mates. Buy it next time it's on sale and you won't regret it!