== 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 === -cdrom Save configuration data and savegames in c:\doomdata, allowing play from CD. (windows only) -config Load main configuration from the specified file, instead of the default. -devparm Developer mode. F1 saves a screenshot in the current working directory. -episode Start playing on episode n (1-4) -extraconfig Load additional configuration from the specified file, instead of the default. -fast Monsters move faster. -file Load the specified PWAD files. -iwad Specify an IWAD file to use. -loadgame Load the game in slot s. -mb Specify the heap size, in MiB (default 16). -mmap Use the OS's virtual memory subsystem to map WAD files directly into memory. -noblit Disable blitting the screen. -nodraw Disable rendering the screen entirely. -nomonsters Disable monsters. -nomusic Disable music. -nosfx Disable sound effects. -nosound Disable all sound output. -respawn Monsters respawn after being killed. -servername When starting a network server, specify a name for the server. -skill Set the game skill, 1-5 (1: easiest, 5: hardest). A skill of 0 disables all monsters. -turbo 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 [ | ] Start a game immediately, warping to ExMy (Doom 1) or MAPxy (Doom 2) === Compatibility === -donut Use the specified magic values when emulating behavior caused by memory overruns from improperly constructed donuts. In Vanilla Doom this can differ depending on the operating system. The default (if this option is not specified) is to emulate the behavior when running under Windows 98. -gameversion Emulate a specific version of Doom. Valid values are "1.9", "ultimate", "final", "final2", "hacx" and "chex". -setmem 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). -spechit Use the specified magic value when emulating spechit overruns. -statdump Dump statistics information to the specified file on the levels that were played. The output from this option matches the output from statdump.exe (see ctrlapi.zip in the /idgames archive). === Demo options === -longtics Record a high resolution "Doom 1.91" demo. -maxdemo Specify the demo buffer size (KiB) -playdemo Play back the demo named demo.lmp. -record Record a demo named x.lmp. -timedemo Play back the demo named demo.lmp, determining the framerate of the screen. === Display options === -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. -8in32 Set the color depth of the screen to 32 bits per pixel. -bpp Specify the color depth of the screen, in bits per pixel. -fullscreen Run in fullscreen mode. -geometry 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 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 Specify the screen width, in pixels. -window Run in a window. === Networking options === -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
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 Reduce the resolution of the game by a factor of n, reducing the amount of network bandwidth needed. -extratics 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. -localsearch Search the local LAN for running servers. -oldsync Use original game sync code. -port 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. -query
Query the status of the server running on the given IP address. -right Run as the right screen in three screen mode. -search Query the Internet master server for a global list of active servers. -server Start a multiplayer server, listening for connections. -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 For multiplayer games: exit each level after n minutes. === Dehacked and WAD merging === -aa Equivalent to "-af -as ". -af Simulates the behavior of NWT's -af option, merging flats into the main IWAD directory. Multiple files may be specified. -as Simulates the behavior of NWT's -as option, merging sprites into the main IWAD directory. Multiple files may be specified. -deh Load the given dehacked patch(es) -merge Simulates the behavior of deutex's -merge option, merging a PWAD into the main IWAD. Multiple files may be specified. -nocheats Ignore cheats in dehacked files. -nwtmerge Simulates the behavior of NWT's -merge option. Multiple files may be specified.