I am not sure if this is a common error or not, or if this is expected for the demo version but I have tried building both the included demo and the downloadable source code for the RPG 2 and each time I get the error as follows:

** BUILD FAILED **
The following build commands failed:
StripNIB Assets/Mac.nib
(1 Failure)

I am of course running Mac OS Sierra 10.12, and most of the resources and development appears to be Windows based. I can always give it a shot on my other machine but the iMac is much faster.

Edit: Solved! When installing xCode one must also run xCode at least once so that the additional materials can be installed. The RPG 2 Bloody Massacre game does not work well on Mac OS as none of the hotkeys work for the Mac keyboard. Also, the command to quit (Alt F4) does not work on Mac so the only way to exit the game is to tab switch to another application and then force quit Bloody Massacre. Not a huge deal, just something to note.

Best,
Max

Hi, perhaps you need to use Fn+Alt+F4 depending on your Mac OS settings.
Cheers,
Greg