There is a great extension available for Safari called ResponsiveResize which works great for me: http://www.midwinter-dg.com/downloads_safari-extension_responsive-resize.html

Safari - is there a way to set a preferred screen size?
According to the wiki, the PC version of Dungeon Defenders comes with the "gameplay code and source" for UDK, for the purposes of modding.

However, it's not listed in the usual place ("Tools" in Steam), and I can't find any other info online.  Where is the source code?
