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 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. Commands can be "commented out" by modifying the name to that of an invalid name. One way to do this is to place a "|" between the "-" and the actual command word (e.g. "-|warp").