I'll definitely come back to this if I ever install FreeBSD. I found one small issue:

    -rwxr-sr-x  1 games  games  1713664 Jul  9 17:01 /usr/local/share/nethack33/nethack33* 
    -rwxr-sr-x  1 games  games    19744 Jul  9 17:01 /usr/local/share/nethack33/recover* 

Here it's actually the SGID attribute that is set, not SUID.