Command line argument

Development options
The following are special command line options which were used during the development of Doom and are not useful to most people:

Unix port
The following options are understood by the Unix ports of Doom:

Source ports
The following extra options are available in certain source ports:

Using a response file
A response file can be used to store command line arguments to launch a Doom engine-based game with. To use one, launch the game with the argument @. For example, to use the file "response.txt", type:

doom @response.txt

The file format of these files is simply one parameter per line with a carriage return to terminate the line. Each parameter is typed exactly as it is typed on the command line. A parameter can be "commented out" by modifying its name to that of an invalid parameter. One way to do this is to place a "|" between the "-" and the actual option name (e.g. "-|warp").