It sounds like the OP wants the /ww1/version15/Application/bin/start executable from every directory.
To do this, you can either add /ww1/version15/Application/bin/ to your PATH envar (not preferrable) or you can simply add the desired file to one of the PATH directories.
Should give you something like this:
You can add a symlink to your program to one of those paths. Ideally it would be in '/opt/bin/', but you can start off by adding it to some other path which is already in the PATH variable:
sudo ln --symbolic /ww1/version15/Application/bin/start /usr/local/games/ww1
This will make a symbolic link in named 'ww1' which when opened will point to the file in its original location.
BTW if it isn't a WWI game then you might not want it in a games/ folder, so change the '/usr/local/games/' directory to something else.