I thought this might be useful for someone as I’ve seen the question asked about a million times before. I fell across it by accident but seems to circumvent the command prompt window.
For anyone who has Macromedia Director… this works for Windows but might need testing on other platforms. I use a shell xtra to launch blenderplayer. In director, use the following Lingo code:
shell_cmd("blenderplayer.exe -f -g nomipmap mygame.blend",EMPTY,0)
The shell xtra for pc and mac can be found here
If you have compiled a runtime or want to run blenderplayer maybe you could just use the code above to launch blenderplayer then close the main window with
Hope this comes in useful!