== Command line parameters ==

This is a full list of the supported command line parameters. A number of
additional parameters are supported in addition to those present in the DOS
version.

=== General options ===

  -config <file>        Load main configuration from the specified file,
                        instead of the default.

  -extraconfig <file>   Load additional configuration from the specified file,
                        instead of the default.

  -file <files>         Load the specified PWAD files.

  -iwad <file>          Specify an IWAD file to use.

  -nomusic              Disable music.

  -nomusicpacks         Disable substitution music packs.

  -nosfx                Disable sound effects.

  -nosound              Disable all sound output.

  -ravpic               Take screenshots when F1 is pressed.

  -response <filename>  Load extra command line arguments from the given
                        response file. Arguments read from the file will be
                        inserted into the command line replacing this
                        argument. A response file can also be loaded using the
                        abbreviated syntax '@filename.rsp'.

  -savedir <directory>  Specify a path from which to load and save games. If
                        the directory does not exist then it will
                        automatically be created.

  -version              Print the program version and exit.

=== Game start options ===

  -episode <n>    Start playing on episode n (1-4)

  -loadgame <s>   Load the game in savegame slot s.

  -nomonsters     Disable monsters.

  -respawn        Monsters respawn after being killed.

  -skill <skill>  Set the game skill, 1-5 (1: easiest, 5: hardest). A skill of
                  0 disables all monsters.

  -warp <x> <y>   Start a game immediately, warping to level ExMy.

=== Display options ===

  -1               Don't scale up the screen. Implies -window.

  -2               Double up the screen to 2x its normal size. Implies
                   -window.

  -3               Double up the screen to 3x its normal size. Implies
                   -window.

  -display <x>     Specify the display number on which to show the screen.

  -fullscreen      Run in fullscreen mode.

  -geometry <WxY>  Specify the dimensions of the window. Implies -window.

  -height <y>      Specify the screen height, in pixels. Implies -window.

  -noblit          Disable blitting the screen.

  -nograbmouse     Don't grab the mouse when running in windowed mode.

  -nomouse         Disable the mouse.

  -width <x>       Specify the screen width, in pixels. Implies -window.

  -window          Run in a window.

=== Networking options ===

  -autojoin           Automatically search the local LAN for a multiplayer
                      server and join it.

  -connect <address>  Connect to a multiplayer server running on the given
                      address.

  -deathmatch         Start a deathmatch game.

  -dup <n>            Reduce the resolution of the game by a factor of n,
                      reducing the amount of network bandwidth needed.

  -extratics <n>      Send n extra tics in every packet as insurance against
                      dropped packets.

  -nodes <n>          Autostart the netgame when n nodes (clients) have joined
                      the server.

  -oldsync            Use original network client sync code rather than the
                      improved sync code.

  -port <n>           Use the specified UDP port for communications, instead
                      of the default (2342).

  -privateserver      When running a server, don't register with the global
                      master server. Implies -server.

  -server             Start a multiplayer server, listening for connections.

  -servername <name>  When starting a network server, specify a name for the
                      server.

  -solo-net           Start the game playing as though in a netgame with a
                      single player. This can also be used to play back single
                      player netgame demos.

  -timer <n>          For multiplayer games: exit each level after n minutes.

=== Dehacked and WAD merging ===

  -aa <files>        Equivalent to "-af <files> -as <files>".

  -af <files>        Simulates the behavior of NWT's -af option, merging flats
                     into the main IWAD directory. Multiple files may be
                     specified.

  -as <files>        Simulates the behavior of NWT's -as option, merging
                     sprites into the main IWAD directory. Multiple files may
                     be specified.

  -deh <files>       Load the given dehacked patch(es)

  -hhever <version>  Select the Heretic version number that was used to
                     generate the HHE patch to be loaded. Patches for each of
                     the Vanilla Heretic versions (1.0, 1.2, 1.3) can be
                     loaded, but the correct version number must be specified.

  -merge <files>     Simulates the behavior of deutex's -merge option, merging
                     a PWAD into the main IWAD. Multiple files may be
                     specified.

  -noautoload        Disable auto-loading of .wad files.

  -nocheats          Ignore cheats in dehacked files.

  -nwtmerge <files>  Simulates the behavior of NWT's -merge option. Multiple
                     files may be specified.

=== Demo options ===

  -demoextend                       Record or playback a demo without
                                    automatically quitting after either level
                                    exit or player respawn.

  -longtics                         Record or playback a demo with high
                                    resolution turning.

  -maxdemo <size>                   Specify the demo buffer size (KiB)

  -playdemo <demo>                  Play back the demo named demo.lmp.

  -record <x>                       Record a demo named x.lmp.

  -recordfrom <savenum> <demofile>  Record a demo, loading from the given
                                    filename. Equivalent to -loadgame
                                    <savenum> -record <demofile>.

  -shortticfix                      Smooth out low resolution turning when
                                    recording a demo.

  -strictdemos                      When recording or playing back demos,
                                    disable any extensions of the vanilla demo
                                    format - record demos as vanilla would do,
                                    and play back demos as vanilla would do.

  -timedemo <demo>                  Play back the demo named demo.lmp,
                                    determining the framerate of the screen.

=== Compatibility ===

  -setmem <version>  Specify DOS version to emulate for NULL pointer
                     dereference emulation. Supported versions are: dos622,
                     dos71, dosbox. The default is to emulate DOS 7.1 (Windows
                     98).

=== Obscure and less-used options ===

  -cdrom                       Save configuration data and savegames in
                               c:\heretic.cd, allowing play from CD. (windows
                               only)

  -dumpsubstconfig <filename>  Read all MIDI files from loaded WAD files, dump
                               an example substitution music config file to
                               the specified filename and quit.

  -mb <mb>                     Specify the heap size, in MiB.

  -mmap                        Use the OS's virtual memory subsystem to map
                               WAD files directly into memory.

  -noartiskip                  Allow artifacts to be used when the run key is
                               held down.

  -nogui                       If specified, don't show a GUI window for error
                               messages when the game exits with an error.

