Hello,
I am new to the forum and since I loved Amnesia I wanted to check out the source code of HPL1. At a first impression it looks very organized. Congratulations.
Anyway,
while building Overture I found the issue about GLaux.lib missing. Since microsoft deprecated it i found that you do not need to link against it at all instead of download a copy of it if you are using newer Visual Studio versions. All procedures are now in kernel32.dll and others so it looks like it is safe to remove.
I was able to compile everything under Windows 8 RTM and Visual Studio 2012
Have a nice day.
Mattias