The PC demo contains the same very small section seen in the console demo, which came out way back on January 25. One single level from Bulletstorm's time attack mode Echo is on offer, urging you to replay the single-player snippet to climb the online leaderboards. And to discover new and increasingly extravagant ways to kill people, of course.
Bulletstorm was released for PC, Xbox 360 and PlayStation 3 on February 22. It might've been handy to have the demo some time around then.