Duke Nukem Forever multiplayer maps and modes this fall, in the "Hail to the Icons" Parody Pack.
As its name implies, the DLC parodies several games, which we'll allow you to decipher for yourself in the descriptions after the break (take a wild guess at which game those hats are poking fun at). Gearbox and 2K have yet to name a price or firm release date for the content, only giving it a "fall" window. But if you're really into checking the new stuff out as soon as you can, 2K Games is also holding a multiplayer event at its Novato, CA offices in early August -- the main site has details on how to get involved.
And finally, we'd be remiss if we didn't remind you that if you joined the developer's "First Access Club" before DNF dropped back in June, the pack will be free when it eventually launches. We believe Duke would say, "Hell yeah." (But you know, it'd be all gravelly, because that's how he speaks.)