To compile your Ruby game into an executable on Windows, you need to run it through this program from the command line.

In theory, it should be as simple as these two lines in a command prompt:

gem install ocra
ocra my_ruby_game.rb

If you are using sound, you have to ship fmod.dll too. Other gems like ruby-opengl might require their own DLLs too. You can put them in a lib subdirectory and then include them on the command line:

ocra my_ruby_game.rb lib\*

To let your game find the DLLs you have to change the PATH environment like this somewhere early in your game:

ENV['PATH'] = File.join(GAMEROOT,"lib") + ";" + ENV['PATH']

If you have any trouble, feel free to ask on the Gosu boards. Ocra is still a project in development and everybody can benefit from sharing your experience.

If you run into problems with bundling fmod.dll, please see this thread.