The standalone player allows a Blender game to be run without having to load the Blender system. This allows games to be distributed to other users, without requiring them a detailed knowledge of Blender (and also without the possibility of unauthorized modification). Note that the Game Engine Save as Runtime is an add-on facility which must be pre-loaded before use.
The following procedure will give a standalone version of a working game.
enable the checkbox. (You can also Save User Settings, in which case the add-on will always be present whenever Blender is re-loaded).
(give appropriate directory/filename) confirm with Save as Game Engine Runtime.
The game can then be executed by running the appropriate
Note that all appropriate libraries are automatically loaded by the add-on.
If you are interested in licensing your game, read Licensing for a discussion of the issues involved.
If the game is to be exported to other computers, make a new empty directory for the game runtime and all its ancillary libraries, etc. Then make sure the whole directory is transferred to the target computer.