One of the most compelling features of Diablo was that no matter how often you returned to the dungeons, things were never quite the same. Not only would the game engine build up the levels differently each time you played, it would also completely randomize the items and pick a fresh set of baddies for you to slaughter. While the dungeons would feel familiar after a while, you were never quite sure what to expect. To my knowledge, no 3D First- or Third- person game has ever achieved this, but it looks like it will make a brilliant first appearance in Hellgate London.

Flagship Studios promises to take randomization a step further, randomizing not only dungeons but also the London streets, houses and other map features. Enemies will not just be armed with the same weapons all the time, making it a lot harder to gauge what to expect from them.