CHIVALRY & SORCERY has been around a long time. It's an appealing game that may be played at many levels and in many ways, from high fantasy right through to grimly-realistic mediaeval life.
The character generation system can be daunting, but if viewed as an adventure in itself results in characters that are as rounded and well-developed as their players! Even once you have your character ready to go, it pays for both players and GM to have a good grasp of how the system works (especially if you have magic in the game) or you will spend a lot of time browsing your books... but if this sounds negative, if you are prepared to make a modicum of effort it is an excellent game that feels as if it is really happening.
One of the things I particularly like is the modular nature of the game. As you plan your campaign, you can decide whether or not magic works, will priests be able to heal by 'supernatural' powers bestowed by their deities, do elves or dwarves exist and so on... but whatever you put in or leave out, the game remains balanced!
Again, the setting is left open. The core rules talk about both historical mediaeval and high fantasy settings, while sourcebooks and adventures support a detailed fantasy world called Marakush (also home to the 'Heroes of Marakush' CSC). The books about elves and dwarves leave their homelands open, Marakush or any other fantasy world of your choice. Delving back to the original 1st Edition, there's also a world called Arden to explore...