If you've played your cards right, you could be playing Duke Nukem Forever right now. Yes, a small slice of what must be the longest-awaited title in the history of gaming is finally available for mere mortals to enjoy, ahead of the full game's June 14 release. Gearbox Software is allowing members of the Duke Nukem First Access Club to grab the demo through this page.
How does one become a member of the First Access Club? Easy: you need either a Borderlands: Game of the Year Edition key or an access code distributed with Duke Nukem Forever pre-orders at "select" retailers. Enter your details on the page linked above, and you should soon have a Steam key for the demo—if you're doing this on the PC, at least.
Folks who aren't part of the club need not fret, because Rock, Paper, Shotgun has already published an article detailing the demo's contents and some first impressions. There are screenshots, too. From what I understand, the demo includes only two levels, but players will get their fill of "carefully censored" adult content and crude humor as they play their way through a boss fight and a desert canyon.