Here you can find compiled and ready to install SDL based ID-Soft
games for AIX (ppc64) 7.2 
These packages require SDL-1.2.15 and SDL_mixer-1.2.15 and other dependencies 
which you can download from Michael Perzl's AIX Open Source Packages  ftp://www.oss4aix.org/latest/aix72/ 

To install the files here, simply untar them and 
# gmake install 

The resulting binaries will be installed to 
/usr/local/games 

Note. - Chocolate-Doom contains the following runtimes 

 - chocolate-doom
 - chocolate-heretic
 - chocolate-hexen
 - chocolate-strife 
 - chocolate-server 

In order to play the games under qemu-system-ppc64 run them as follows

$ ./chocolate-(doom) -nosound -nofullscreen -nomouse -geometry 640x480 -iwad WADNAME.WAD

replace (doom) with hexen, heretix or strife if you wish to place these games

NetHack.tar - sources and object files - just # gmake install 
nethackdir.tar - compiled nethack and dungeon data files for AIX ppc64 
angband.tar - sources and object files - gmake install (only X11 support) 
              run with export LANG=en_US.utf8