From the sticky:

"Blank/Black Screen with the Demo? Please Read!

If you're playing the Reckoning demo on the PC and are experiencing a black screen after the cinematics play, please try going into your graphic options menu in the demo and set "Post Processing" to off. We apologize for this issue; it has since been fixed in the final version of Reckoning".

官方论坛的置顶帖子。

翻译大概就是，打开选项->选择 graphic options menu-> 把 'Post Processing' 的选择去掉 就可以了。

这个应该是游戏本身的问题，和破解 显卡关系都不大