Diablo II as it was meant to be. Enhanced with new surprises, challenges and features. A team-based mod with a fully functional online realm with game server hosts around the world. Normal difficulty is challenging, especially for new players - but those challenges can be overcome with good strategy and team work. Nightmare starts to get a bit harder and Hell is truly difficult for all but the most seasoned Diablo player (and even they will find challenges!)
An old trailer, but a lot of the bosses and content it shows is still relevant!