Here is just a FYI
Project Professional 2013 RTM is not on MSDN.
Also, Office 2013 and Visio RTM is on MSDN.
And SharePoint Server RTM is now on MDN. I don't know why Project Server 2013 RTM is not there, but I expect it soon.
Cheers!!!!!!
Michael Wharton, MBA, PMP, MCT, MCSD, MCSE+I, MCDBA, MCC 2011, MCC2012
Website http://www.WhartonComputer.com
Blog http://MyProjectExpert.com contains my field notes and SQL queries