I have downloaded a self-contained game called OpenTTD and have extracted the archive into /opt directory.
The contents of the extracted game directory are as follows:
ls -l /opt/openttd-14.1-linux-generic-amd64/
total 57936
drwxr-xr-x 2 root root 4096 svi 3 23:06 ai
drwxr-xr-x 2 root...
