"Video game development is an extremely long and difficult process. In the case of some titles (Splinter Cell: Conviction), the entire project must be scrapped and redone, causing an unusually long development cycle.
"You’re all familiar with Duke Nukem Forever. When it releases this June, that will be the culmination of over fourteen years of development (although “development” is debatable based on how much you know about the case). There obviously comes a point, and when Duke Nukem Forever releases, our focal point of delays will have to be moved elsewhere for criticism.
"Where will it move? Half-Life 2: Episode Three. It’s not humanly possible to live up to the expectations it has set itself up for."