I discovered how to launch the RGSS3 player into Console and Test mode. All you have to do is launch Game.exe from a batch script or command line.
Place that in a .bat file, and run the file whenever you need to playtest your game. $TEST will be true and the console window will show up. You can also use a Batch2Exe converter, convert the batch script to an EXE and rename it to "Game.exe". Then rename Game.exe, Game.ini to something else (Like RealGame) and you can launch the batch script from the editor. Leave Game.rxproj as it is. In fact, I'll post an example project after its all setup.
You can also replace this line:
With this line:
EDIT: Here's the demo project. Just open Game.rxproj and run the game from the editor. $DEBUG and $TEST will be true and the console will appear. This includes all Audio, Graphics, fonts, etc... This is the whole works.
https://www.box.com/s/dty8mrl1esf1k6u32k65EDIT 2:
Found a better way to setup the batch script.
if "%~1"=="debug" (
RealGame.exe test console
) else (
RealGame.exe
)
Convert that to an Exe and place it as Game.exe in your project. Be sure to rename your real game and real ini to "RealGame".