I don't think you're likely to find anything like a comprehensive list of all war crimes for the simple reason that there are countless atrocities that were never recorded. The Nazi state engaged in an orgy of criminality, ranging from the clinically orchestrated extermination campaign of the Final Solution to the execution of hostages in reprisal to the impromptu murder of literally millions of civilians by troops in the field.

The Nuremberg Trial proceedings may be as close as you are going to get, and even that is necessarily abridged. If you're interested, you can find them here: http://avalon.law.yale.edu/imt/count.asp

What exactly is your project? Is it necessary that you have an exhaustive list of German atrocities?