The Project Server 2013 and Project Client 2013 Service Pack 1 now released. You can download it form below links

Microsoft Project Server 2013 Service Pack 1: http://www.microsoft.com/en-us/download/details.aspx?id=42011 

Microsoft Project 2013 Service Pack 1 32 bit: http://www.microsoft.com/en-us/download/details.aspx?id=42013

Microsoft Project 2013 Service Pack 1 64 bit: http://www.microsoft.com/en-us/download/details.aspx?id=42020

It's recommended to install SharePoint 2013 SP1 http://www.microsoft.com/en-us/download/details.aspx?id=42008 and then Project Server 2013 SP1

If you need any additional information or help with the Service Pack Installation please contact us.