# 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

Parameter | Description
--- | ---
-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. Each succeeding argument is treated as a PWAD file name until one starts with a dash or the argument list is exhausted.
-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 <file> | Load extra command-line arguments from the given response file. Arguments read from the file are inserted into the command line, replacing this argument. A response file can also be loaded using the abbreviated syntax '@file.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

Parameter | Description
--- | ---
-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 | Start a game immediately, warping to MAPx.

## Display options

Parameter | Description
--- | ---
-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 <WxH> | Specify the dimensions of the window. Implies -window.
-height <H> | 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 <W> | Specify the screen width, in pixels. Implies -window.
-window | Run in a window.

## Networking options

Parameter | Description
--- | ---
-autojoin | Automatically search the local LAN for a multiplayer server and join it.
-class <n> | Specify player class: 0=fighter, 1=cleric, 2=mage, 3=pig.
-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.
-randclass | In deathmatch mode, change a player's class each time the player respawns.
-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

Parameter | Description
--- | ---
-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)
-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

Parameter | Description
--- | ---
-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 <save-num> <demo-name> | Load a game from the given savegame slot and record a demo from it. Equivalent to -loadgame <save-num> -record <demo-name>.
-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

Parameter | Description
--- | ---
-gameversion <version> | Emulate a specific version of Hexen. Valid values are "1.1" and "1.1r2".
-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).
-v10override | If provided, the check for the v1.0 IWAD file is disabled, even though it will almost certainly cause the game to crash.

## Obscure and less-used options

Parameter | Description
--- | ---
-artiskip | Don't allow artifacts to be used when the run key is held down.
-cdrom | Save configuration data and savegames in c:\hexndata, allowing play from CD. (windows only)
-dumpsubstconfig <file> | Read all MIDI files from loaded WAD files, dump an example substitution music config file to the specified file, 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.
-nogui | If specified, don't show a GUI window for error messages when the game exits with an error.
-scripts <path> | Development option to specify path to level scripts.