Running an old game Black and White

Running /home/hkl8324/.local/share/lutris/runners/wine/lutris-fshack-6.14-2-x86_64/bin/wine /home/hkl8324/LutrisGames/bw1/drive_c/Program Files (x86)/Lionhead Studios Ltd/Black & White/runblack.exe
Initial process has started with pid 14412
Start monitoring process.
wineserver: using server-side synchronization.
Monitored process exited.
Initial process has exited (return code: 13568)
All monitored processes have exited.
Exit with returncode 13568

Using the script on the site.
What does this returncode mean?
And how can I find a list of returncodes?