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== 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

=== General options ===

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

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

  -devparm                     Developer mode. F1 saves a screenshot in 
                               the current working directory.  

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

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

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

  -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). 

  -mmap                        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 

  -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)

=== Compatibility ===

  -donut <x> <y>          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 <version>  Emulate a specific version of Doom. Valid values 
                          are "1.666", "1.7", "1.8", "1.9", "ultimate", 
                          "final", "final2", "hacx" and "chex".  

  -pack <pack>            Explicitly specify a Doom II "mission pack" to 
                          run as, instead of detecting it based on the 
                          filename. Valid values are: "doom2", "tnt" and 

  -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).  

  -spechit <n>            Use the specified magic value when emulating 
                          spechit overruns.  

  -statdump <filename>    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 in the /idgames 

=== Demo options ===

  -longtics         Record a high resolution "Doom 1.91" demo.  

  -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.  

  -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.

=== 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 

  -bpp <bpp>           Specify the color depth of the screen, in bits per 

  -fullscreen          Run in fullscreen mode.  

  -geometry <WxY>[wf]  Specify the dimensions of the window or fullscreen 
                       mode. An optional letter of w or f appended to the 
                       dimensions selects windowed or fullscreen mode.  

  -grabmouse           Grab the mouse when running in windowed mode.  

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

  -noblit              Disable blitting the screen.  

  -nodraw              Disable rendering the screen entirely.  

  -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.

=== 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 <address>  Connect to a multiplayer server running on the given 

  -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.  

  -localsearch        Search the local LAN for running servers.  

  -newsync            Use new network client sync code rather than the 
                      classic sync code. This is currently disabled by 
                      default because it has some bugs.  

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

  -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.  

  -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             Query the Internet master server for a global list 
                      of active servers.  

  -server             Start a multiplayer server, listening for 

  -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 

=== 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)  

  -dehlump           Load Dehacked patches from DEHACKED lumps contained 
                     in one of the loaded PWAD files.  

  -merge <files>     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.  

  -nodeh             Disable automatic loading of Dehacked patches for 
                     certain IWAD files.  

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