Nice
Voice acting was a bit...meh.
However, speaking as someone who enjoyed duke nukem forever (for all it's worth it's a solid game with solid gameplay and some interesting puzzles unlike most games. It's a nice break from GEARS OF WAR ARGH MANLY SERIOUSNESS or CALL OF DUTY OMG TERRORISTS) however this does point out one thing that DNF does have a few issues with: just one too many references in too short a time. I mean, within the first 15 minutes I would count about 5-6 references where only 3 were worth any real impact.
However all in all a humourous flash that does point out one issue I think DNF sinks at for most: it feels like a reference game.