Command line arguments

Chocolate Doom supports the majority of Vanilla Doom's command line arguments. However, several others have also been added:

Table of contents

1 General options

-cdrom: Save configuration data and savegames in c:\doomdata, allowing play from CD. (windows only)
-config <file>: Load configuration from the specified file, instead of default.cfg.
-devparm: Developer mode. F1 saves a screenshot in the current working directory.
-episode <n>: Start playing on episode n (1-4)
-extraconfig <file>: Load extra configuration from the specified file, instead of chocolate-doom.cfg.
-fast: Monsters move faster.
-file <files>: Load the specified PWAD files.
-iwad <file>: Specify an IWAD file to use.
-loadgame <s>: Load the game in slot s.
-mb <mb>: Specify the heap size, in MiB (default 16).
-noblit: Disable blitting the screen.
-nodraw: Disable rendering the screen entirely.
-nommap: Do not use the OS's virtual memory subsystem to map WAD files directly into memory.
-nomonsters: Disable monsters.
-nomusic: Disable music.
-nosfx: Disable sound effects.
-nosound: Disable all sound output.
-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.
-turbo <x>: Turbo mode. The player's speed is multiplied by x%. If unspecified, x defaults to 200. Values are rounded up to 10 and down to 400.
-warp [<x> <y> | <xy>]: Start a game immediately, warping to ExMy (Doom 1) or MAPxy (Doom 2)

-gameversion <version>: Emulate a specific version of Doom. Valid values are "1.9", "ultimate" and "final".
-spechit <n>: Use the specified magic value when emulating spechit overruns.

-longtics: Record a high resolution "Doom 1.91" demo.
-maxdemo <size>: Specify the demo buffer size (KiB)
-netdemo: Play back a demo recorded in a netgame with a single player.
-playdemo <demo>: Play back the demo named demo.lmp.
-record <x>: Record a demo named x.lmp.
-timedemo <demo>: Play back the demo named demo.lmp, determining the framerate of the screen.

-1: Don't scale up the screen.
-2: Double up the screen to 2x its normal size.
-3: Double up the screen to 3x its normal size.
-fullscreen: Run in fullscreen mode.
-gdi: Use the Windows GDI driver instead of DirectX. (windows only)
-geometry <WxY>: Specify the screen mode (when running fullscreen) or the window dimensions (when running in windowed mode).
-grabmouse: Grab the mouse when running in windowed mode.
-height <y>: Specify the screen height, in pixels.
-nograbmouse: Don't grab the mouse when running in windowed mode.
-nomouse: Disable the mouse.
-nonovert: Enable vertical mouse movement.
-novert: Disable vertical mouse movement.
-width <x>: Specify the screen width, in pixels.
-window: Run in a window.

-altdeath: Start a deathmatch 2.0 game. Weapons do not stay in place and all items respawn after 30 seconds.
-autojoin: Automatically search the local LAN for a multiplayer server and join it.
-avg: Austin Virtual Gaming: end levels after 20 minutes.
-connect <address>: Connect to a multiplayer server running on the given address.
-deathmatch: Start a deathmatch game.
-dedicated: Start a dedicated server, routing packets but not participating in the game itself.
-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.
-ignoreversion: When running a netgame server, ignore version mismatches between the server and the client. Using this option may cause game desyncs to occur, or differences in protocol may mean the netgame will simply not function at all.
-left: Run as the left screen in three screen mode.
-oldsync: Use original game sync code.
-port <n>: Use the specified UDP port for communications, instead of the default (2342).
-query <address>: Query the status of the server running on the given IP address.
-right: Run as the right screen in three screen mode.
-search: Search the local LAN for running servers.
-server: Start a multiplayer server, listening for connections.
-timer <n>: For multiplayer games: exit each level after n minutes.

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