Arma 2: Startup Parameters

These parameters can be configured by creating a new shortcut on your desktop and then adding the appropriate option in the target line.

Example:

"C:\arma2\arma2.exe" -nosplash -mod=test;x\test;c:\arma2\test2

Available parameters

Display Options

-x=<number>	Used to set resolution width.
-y=<number>	Used to set resolution height.
-window	Displays Arma windowed instead of full screen. It can be used in conjunction with -x/-y:

 -window -x=800 -y=600.

Game Loading Speedup

-nosplash	Disables splash screens.
-world=<string>	Select a world loaded by default. Example: -world=Utes. For faster game loading (no default world loaded and world intro in the main menu, only at game start, disabled): -world=empty.
-skipIntro	OA 1.55+ only: Disables world intros in the main menu permanently.

Performance

-maxMem=<number>	Defines memory allocation limit to number (in MegaBytes). 256 is hard-coded minimum (anything lower falls backs to 256). 2047 is hard-coded maximum (anything higher falls back to 2047). Engine uses automatic values (512-1536 MB) w/o maxMem parameter. Yet filecache is excluded from the virtual address limit, always was, see our developers blog here : http://www.bistudio.com/index.php/company/developers-blog/85-breaking-the-32-bit-barrier
-winxp	Forces the game to use Direct3D version 9 only, not the extended Vista / Win7 Direct3D 9Ex - the most visible feature the Ex version offers is a lot faster alt-tabing. May help with problems using older drivers on multi-GPU systems.
-noCB	Turns off multicore use. It slows down rendering but may resolve visual glitches.
-cpuCount=<number>	Change to a number less or equal than numbers of available cores. This will override auto detection. Details below.
-exThreads=<number>	Change to a number 0,1,3,5,7. This will override auto detection (which use 0 for dualcore and 7 for quadcore). Details below.

Profile Options

-name=<string>	Profile name.
-profiles=<path>	Location of user-profile folder. Details: -profiles.

Developer Options

-noPause	Allow the game running even when its window does not have focus.
-showScriptErrors	Introduced to show errors in scripts on-screen.
-noFilePatching	Ensures that only PBOs are loaded and NO unpacked data. For more info see CMA:DevelopmentSetup.
-init=<command>	Run scripting command once in the main menu. For example to start a certain SP mission of choice automatically. Example: -init=playMission["","M04Saboteur.Sara"]. See also playMission. The Mission has to reside in the "arma2\Missions" folder, NOT the user directory.
"<path>\mission.sqm"	Load a mission directly in the editor. Example: "c:\arma2\users\myUser\missions\myMission.intro\mission.sqm"
"<path>\mission.biedi"	Load a mission directly in the 3D editor. Example: "c:\arma2\users\myUser\missions\nextMission.intro\mission.biedi"

Misc.

-buldozer	Starts Buldozer mode.
-noLand	Starts with no world loaded. (Used for Buldozer)
-noSound	Disables sound output.
/secuexp	Starts securom support for troubleshooting.

Modifications

-mod=<string>

Loads the specified sub-folders for different mods. Separated by semi-colons. Absolute path and multiple stacked folders are possible. In Linux multiple folders arguments need the following separation syntax: -mod=mod1\;mod2\;mod3

Complex example:

-mod=test;x\test;c:\arma2\test2

• "test" is located in the arma2 installation folder ("Arma 2\test") (relative path)
• "x\test" is in the installation folder ("ArmA 2\x\test") (relative path; subfolder)
• "c:\arma2\test2" is in "c:\arma2\test2" (absolute path)

"Relative path" starts from, or is rooted at, the directory from where the arma2 executable has been started, and is not always the same where the executable is, like in betas. Usually this is the same as the installation path and the same of what's written in Windows registry. But if you copy or symlink the necessary file and folders, you may have different roots. It's useful when have more dedicated server.

Client Network Options

-connect=<ip>	Server IP to connect to.
-port=<number>	Server port to connect to.
-password=<string>	Server password to connect to.
-host	Start a non-dedicated multiplayer host.

Server Options

-server	Start a dedicated server. Not needed for the dedicated server exe.
-port=<number>	Port to have dedicated server listen on.
-pid=<filename>	File to write the server's PID (process ID) to. The file is removed automatically when the exe is stopped. Only works for dedicated servers.
-ranking=<filename>	Generates a ranking file.
-netlog	Enables multiplayer network traffic logging.
-cfg=<filename>	Selects the Server Basic Config file. Config file for server specific settings like network performance tuning.
-config=<filename>	Selects the Server Config File. Config file for server specific settings like admin password and mission selection.
-BEpath=<path>	If you are running BattlEye this allows you to specify a separate path for the BattlEye auto updates - this is required if you are running multiple dedicated servers.
-mpStatistics	Command to record various MP related statistics into mpStatistics.log, for admins and developers to profile server behaviour (b1.54.73801)

Use unknown

-download	Use unknown. (Possibly set auto download of missing Mod pbo's from server.)
-generateShaders	Use unknown. (Possibly for use with Buldozer)
-disableProgramDrawing	Use unknown. (Possibly for use with Buldozer)
-useProgramDrawing	Use unknown. (Possibly for use with Buldozer)
-gamerTag=	Use unknown.
-benchmark	Intended for automated benchmarking, but was never finished and is not working.

Closer Description

config

The option -config allows you to specify a specific server.cfg file.

profiles

-profiles is a startup option allowing you to choose an alternate location for the user profile files, such as downloaded missions and .cfg files.

The windows user account would need permissions to write to the folder of choice.

An example might be like this:

"C:\arma2\Arma2.exe" -profiles=C:\arma2\Profiles

or

"C:\arma2\Arma2.exe" -profiles=Profiles

would store all your profiles/configs/downloaded content into your ROOT ArmA folder under the folder name "Profiles"

ranking

-ranking is a startup option allowing you to output ranking info or othewise know as player stats.

The windows user account would need permissions to write to the folder of choice.

An example might be like this:

"C:\arma2\Arma2.exe" -ranking=C:\arma2\ranking.log

nosplash

-nosplash is a startup option that allows you to bypass the splash screens on startup of Arma2.

Note: Real speed-up gained with this is likely to be negligible with Arma2, as the loading screens are handled in parallel with the game data being loaded, and the loading itself takes quite long thanks to the amount of data needed.

cpuCount

-cpuCount= is option which allows define number of CPUs/cores available.

The best way to simulate dual core on quad core is to use -cpuCount=2 when you run the game and then change the affinity to 2 cores to make sure additional cores can never be used when some over-scheduling happens. It might be also possible to set the affinity in the OS before you launch the process, that would work as well.

exThreads

-exThreads= is option to define extra threads.

All file operations go through a dedicated thread. This offloads some processing from the main thread, however it adds some overhead at the same time. The reason why threaded file ops were implemented was to serve as a basement for other threads ops. When multiple threads are running at the same time, OS is scheduling them on different cores. Geometry and Texture loading (both done by the same thread) are scheduled on different cores outside the main rendering loop at the same time with the main rendering loop.

Ex(tra)threads table

Number	Geometry loading	Texture loading	File operations
0	0	0	0
1	0	0	1
3	0	1	1
5	1	0	1
7	1	1	1