Diablo III is an action role-playing game similar in style to its predecessor, Diablo II. The proprietary engine will incorporate Havok physics and feature destructible environments with an in-game damage effect. The developers are aiming to make the game run on a wide range of systems, and have stated that DirectX 10 will not be required. Diablo III will use a custom 3D game engine in order to present an overhead view to the player, in a somewhat similar way to the isometric view used in previous games in the series. Enemies will utilize the 3D environment as well, in ways such as crawling up the side of a wall from the depths into the combat area.
As in Diablo II, multiplayer games will be possible using Blizzard's Battle.net service, with many of the new features being developed for StarCraft II also available in Diablo III.Players will be able to drop in and out of sessions of co-operative play with others.
An enhanced quest system, a random level generator, and a random encounter generator are slated for use in order to ensure the game provides different experiences when replayed. Overall, the game will include both static and randomly generated levels. Additionally, there will be class-specific quests to go along with the main storyline quests.
Story
The game takes place in Sanctuary, the dark fantasy world of the Diablo series. This world was saved twenty years prior by a handful of unnamed heroes in Diablo II. Warriors that survived the onslaught of the armies of the Burning Hells have gone mad from their ordeals, and it is up to a new generation of heroes to face the forces of evil threatening the world of Sanctuary. Players will have the opportunity to explore familiar settings such as Tristram.
The only confirmed NPC is Deckard Cain, who has appeared in both of the previous games. Cain's journal on the official site brings players up to speed on the events of the first two games.