Publisher 2K confirmed on its official forums that Duke is "using Steamworks and only Steamworks for both the single player and multiplayer components."
Also announced today were the pre-order bonuses offered by several stores. Buying at Walmart will net you a classy DNF trucker hat. GameStop goes highbrow with the 'Duke's Big Package' downloadable content pack, which contains Big Head Mode, a boost to Duke's Ego (health) and a pack of t-shirts for Duke to wear. The Australian EB Games, the retailer offering Duke's Big Package down under, gives a teasing peek at it. More retailer pre-order bonuses are still to be unveiled.
Duke Nukem Forever is due out for PC, Xbox 360 and PlayStation 3 on May 3. A $100 limited Balls of Steel Edition exists for Duke diehards, with goodies including a hardcover art book, poker chips and a bust of Duke himself.