TimeGate Studios has told readers on the Section 8 official forums that there will not be a demo released for the PC version of the game.
"We do not have plans to release a Section 8 demo for the PC at this time," reads the thread. "Currently, we only have a demo for the Xbox 360 version."
Sorry PC players, you will just have to take your chances with the retail version, which was released yesterday.
Unless, of course, you also own an Xbox 360. Still, that doesn't give you an idea of how it plays on PC.