It has been four years since the game that lets the player be God over virtual people, The Sims, first hit PC screens.
Since then, it has made millions, sold millions and spawned several expansion packs. The Sims 2 is the first full overhaul of the hit game, however.
Electronic Arts and Maxis have added the extra ingredient of DNA into the mix and much more realistic 3D graphics, which gives the game an eerie feeling of reality.
Added to that, the gameplay is much more goal-oriented and feels more like a game because of the fears versus aspirations system of winning points.
From BBC News