It's RTCW with tons of quality of life improvements, added weapons, upgraded textures and models, tons of difficulty options, and perhaps best of all the steam workshop which contains at least 30-40 custom campaigns/maps. There's also LOTS of achievements including some for completing some of these custom campaigns which is a huge bonus. I do prefer some of the original sound effects which have been replaced, however there is a mod called Vanilla Plus which reverts these changes and offers a more "original" RTCW experience. I cannot recommend this enough.

It's RTCW with tons of quality of life improvements, added weapons, upgraded textures and models, tons of difficulty options, and perhaps best of all the steam workshop which contains at least 30-40 custom campaigns/maps. There's also LOTS of achievements including some for completing some of these custom campaigns which is a huge bonus. I do prefer some of the original sound effects which have been replaced, however there is a mod called Vanilla Plus which reverts these changes and offers a more "original" RTCW experience. I cannot recommend this enough.