The conceptual misconception you have here is that you assume that command line options are generic or common across all programs.
For instance, I could write a program that shuts down the system when passing a command line argument such as
-1280x760. I could write a program that deletes all files on your computer and sends a command to launch a missile in response to receiving any command line argument.
Command line arguments are application-specific, arbitrary commands that are completely dependent on the behavior of the individual program. So, where one game might treat
-w as "run in windowed mode", another game might treat it as "make it impossible to ever win the game again, and deactivate my multiplayer account".
Since you said "game" (in the generic) instead of telling us what game you are playing in particular, we can not help you any further.