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Conan Hughes
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Thursday, June 17, 2010
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Left 4 Dead 2 LAN (Offline)
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Those who like to play the original Left 4 Dead
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with their friends locally, ergo without an
21
Internet connection, may also want to play the
sequel Left 4 Dead 2 on a local area network
(LAN) as well. I've created a guide on how to
host and join a local game session without
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Almost two years have passed since I created this guide and a lot of game updates have
been pushed through by Valve since then. As a possible fix to recent multiplayer
connection problems, create a shortcut for Left 4 Dead 2.
Open the shortcuts properties, proceed to Shortcut tab and add the following at the end of the
Target field: insecure. Click Apply/OK to save the new setting.
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Every time you run Left 4 Dead 2, you should do so by using this modified shortcut. The guide
2011 (36)
below will not work if you dont use the shortcut.
2010 (100)
December (16)
After following the steps above, run the game. You will then need to enable the
November (23)
developer console. Optionally, you can also enable automatic detection of LAN games for
October (4)
convenience to those who will join your hosted game. Here's how:
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How to enable Developer Console:
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1. At the game main menu, click Options.
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2. Click Keyboard/Mouse.
3. Click Allow Developer Console and select Enabled.
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Labels
Left 4 Dead 2 main menu with console open.
Click image to enlarge.
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How to automatically detect LAN games:
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1. At the game main menu, click Options.
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2. Click Multiplayer.
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video
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3. Click Automatically Discover LAN Games and select Enabled.
With all the necessary settings set up, it's now time to host a game.
How to create or host a Left 4 Dead 2 local (LAN) game:
1. Open the Developer Console by pressing ` on your keyboard. (It is the key below
Esc.)
2. Type sv_lan 1 then press Enter.
3. Type sv_allow_lobby_connect_only 0 then press Enter.
4. In the console, type map then press Space.
5. Right after you press Space all the playable maps will be displayed.
6. Use your keyboard arrows to scroll to your desired map.
7. Press Enter.
Basically the command to create a local game is this:
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map nameOfMapHere gameType
An example of a map is this c5m1_waterfront. c5 stands for campaign five, m1 for
chapter/map one, and waterfront the corresponding name. Those with The Passing
campaign, the campaign code assignment is c6.
List of all Left 4 Dead 2 maps:
Dead Center:
c1m1_hotel
c1m2_streets
c1m3_mall
c1m4_atrium
The Passing:
c6m1_riverbank
c6m2_bedlam
c6m1_port
Dark Carnival:
c2m1_highway
c2m2_fairgrounds
c2m4_barns
c2m5_concert
c2m3_coaster
Swamp Fever:
c3m1_plankcountry
c3m2_swamp
c3m3_shantytown
c3m4_plantation
Hard Rain:
c4m1_milltown_a
c4m2_sugarmill_a
c4m3_sugarmill_b
c4m4_milltown_b
c4m5_milltown_escape
The Parish:
c5m1_waterfront
c5m2_park c5m3_cemetery
c5m4_quarter
c5m5_bridge
List of all game modes:
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campaign
scavenge
realism
survival
versus
mutation
If the gameType is left blank, the hosted game will default to a campaign game with
normal difficulty. To choose another mode, just type in the console the game mode
after the map name.
Example: map c1m4_atrium realism
How to join a LAN game:
When the game is created, the remaining thing to do is to let other players join the
game. If Automatically Discover LAN Games is enabled, Steam Group Servers may
appear in the main menu which players can use to join your game.
Alternately, the console command to join is connect hostIPAdresshere.
Example: connect 123.123.123.123
Steam Group Servers (at the bottom center) appears when it detects a game.
Click image to enlarge.
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When clicked, you will then proceed to this window that lists all available games.
Click image to enlarge.
Determining the host's IP address:
Determining your local IP address can be tricky when you're connected to the Internet,
so it's best to stay offline when hosting a game. Anyway, the game host must type
net_status in the developer console. Some data will appear afterwards. You will need to
look for a phrase similar to this: "Net status for host 11.111.11.11:" The numbers
that appear on that phrase is the host's IP address.
Other notes and info:
This offline LAN game guide does not require Hamachi, Garena, or Steam. However, I
suppose the version of the game installed on all computers must be the same.
Make sure Left 4 Dead 2 is added to the firewall exemption.
sv_allow_lobby_connect_only
If set, players may only join this server from matchmaking lobby, and may not connect
directly.
sv_lan ( def. "0" )
If set, server is a lan server ( no heartbeat, no authentication, no non-class C
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51 comments
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Top comments
Sheldon du Trevou shared this via Google+ 1 year ago - Shared publicly
1 Reply
Jacky Choo 1 year ago - Shared publicly
I try the first step failed~ it says Steam is not running, you must start steam to play..
+4
5
4
1 Reply
Martn Isla 1 year ago - Shared publicly
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Martn Isla 1 year ago - Shared publicly
Hey, thanks for this post. I have a problem. I just can't open the console. I configure
the Developer console option, but it won't work. I also tried with "-console" and/or "toggleconsole", but when the game says "you're running in insecure mode..." I have to
close the console (can't write anything on it anyway) and it won't open again :(
+1
2
1
1 Reply
Anders Kjerrman Larsson 1 year ago - Shared publicly
Awesome! THX!!!
^^
1 Reply
carl wong 1 year ago - Shared publicly
how can i play the add-on campaign in multiplayer? what do i needa enter in the
console command?
1 Reply
Conan Hughes 1 year ago
You need to know the name of the add-on campaign map. To host a game, simply
use "map map_name" command (without quotes) in the console.
carl wong 1 year ago
thanks appreciate it
Martin Simo 1 year ago - Shared publicly
hey, commenting on an ancient but helpful blog post. First off, thanks for all the info.
Second do you have any idea how to start realism versus, i mean there is versus for
versus and realism for realism but i was unable to find the correct combination for
realism versus. Thanks.
+1
2
1
1 Reply
Conan Hughes 1 year ago
I didn't notice your comment until now. Damn Google+, it failed to notify me again.
Thanks for the compliment.
Anyway, I don't have this game anymore on my computer. But check
out http://left4dead.wikia.com/wiki/Console_commands. It mentions
"mutation12"
as the
code for realism versus. I hope this works. Good luck!
Joe Smith 1 year
ago
play any ofAre
the you
mutations
u need to
to do that go to
a developer?
Tryget
outthe
themutation
HTML tonumber
PDF API
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version
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To play any of the mutations u need to get the mutation number to do that go to
your achievements and look for Mutantoverload and open the list, you will find all
the mutations now count till the one you want(left to right,Top to bottom).(realism
versus is 14)
so now go to your console and type in "map c1m1_hotels mutation14" (no space
Le Mans 1 year ago - Shared publicly
At first I still can play it but after i quit and try to connec. Back it it shows me this lan
server are restricted to local clients . Why does this happen
+1
2
1
1 Reply
1 year ago
Hello, i have a problem with versus mode. Game loads, ewerything is fine, but i cant
change team to zombies. When i press M, it shows UNABLE TO CHANGE TEAMS, you
must wait until all players all loaded. How can i fix this? Thanks anyway.
Conan Hughes 1 year ago
"You must wait until all players all loaded" That? Let all players join the game, as in
really connected and roaming about in the game.
1 year ago
Hi there. I have a problem with versus mode. When i pick map, it starts, loads, but i
cant change team. When i press M it shows wait for players to login. Can you help?
Thanks for help anyway.
2 years ago
when you change the shortcut, after xxxxxleft4dead2.exe'' you need to [space] before
typing -insecure hope that helps =)
Pallisgaard91 2 years ago
When i change the shortcut i get the message "Unable to execute command (87)" can
you please help me?
2 years ago
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how to play versus mode??
Rezsa Megantara 2 years ago
My friend not find my game... And then he connect with ip address it says that
disconnect after 10 retries. Help
2 years ago
Why doesnt it work my console will not show up
mohannad 2 years ago
hi :)) can u tell me how to vote to make change the difficulty ?
Conan Hughes 2 years ago
I can't help you regarding this as I am not playing Left 4 Dead 2 anymore. 2.0.8.6 was
the last version I checked my guide to be still working on.
2 years ago
Not working. Conan, could you tell me which version it worked on for you? I followed
yourdirections, and connection just doesn't work. The other computers simply cannot
see my LAN game...
2 years ago
iv tried every single steps that you've said out here, but may i ask, "is this instructions
are for L4D2 only?" or can you atleast specify d instructions for L4D1...??? i would like
to play these games offline without the use of internet... pls do respond to my concern.
thanx Anonymously_suckz101
Conan Hughes 2 years ago
Here's a LAN guide for the original L4D:
http://conanhughes.blogspot.com/2012/08/left-4-dead-lan.html
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2 years ago
is this patched?
Rubberducksucker 2 years ago
Any 1 know if the can be done with all games of Steam?
LorDefiX OverLorD 2 years ago
nope, definetly not all games on steam, but probably all games running the source
engine, having the source developer console.
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