Not only a graphics achievement, it has also solid gameplay which requires tactical leadership and ability to cover.
The story is really good too, and the game isn't as short as others in the genre.
The gameplay requires much more than shoot everything around, specially in realistic mode, you will have to use your teammates correctly and know to cover yourself or you will be death really fast.
Terrorist hunt isn't as fun as it could be because enemy spawning.
A good game without any doubt. Even you can replay Campaing because it's really worth it.