As you can see from screenshots, this game is very similar to Diablo II however it's not exactly identical to Diablo and in some area I found this game is more flexible and interesting.
1st of all in this game you can customise your character by select 2 base classes from total of 8 (9 in immortal throne) eg, you can start as Fire mage (Earth) then decide to go up close and personal by select Warfare as your 2nd class (Earth+Warfare = Battle Mage) with 9 primary classes, there are more then 44 total classes!!
The game itself is also pretty good, story line, graphic, weapon (common, magical, unique, set), tons of magic stone to enhance your weapons (each difficulty level have its own set of items and stones)
In brief, this game is one of the best RPG games on PC I've ever played; If you like Diablo then I strongly recommend it.