Sacred is an action based RPG released in 2004. The gameplay is very similar to Blizzard's Diablo.
Sacred has 6 character types - Gladiator, Dark Elf, Wood Elf, Vampiress, Battle Mage, Seraphim. The Underworld expansion adds two more classes - Deamon and Dwarf.
The game is compound of a main quest line and a set of minor quests.
Screenshots:
Sacred
Sacred Underworld Trailer