[Kyanos]

This is a simple multiplayer launcher .bat file for starting LAN games at home, should work for Net games as well.
This launcher will start 2-3 player games. The next post has a similar .bat for setting up larger games, up to 8 players.

For EDuke32-oldmp
thread: https://forums.duke4...-eduke32-oldmp/
download: http://dukeworld.duk.../eduke32/oldmp/

It asks a few simple questions, to set the command line parameters.
Which grp to load?
Hosting or Joining?
What name to play as?
How many players?
Other players IPs to connect to?
pics in spoiler

Spoiler

It can get either IPv4 or Net IP addresses for you as well if needed.

It saves the command line parameters to a file _last.bat that you can rename and use later.

Each player needs to run this on their machine to start a match.

Here is the batch file in a zip:  EDuke32-oldmp_launcher.zip (1.11K)
Number of downloads: 313
Code is plain text in spoiler.

Spoiler

echo off

:start
cls
echo EDuke32-oldmp
echo Launcher
echo.
echo 1. Host Multiplayer Game
echo 2. Join Multiplayer Game
echo 3. Get IP Address
echo 4. Quit
echo.
choice /C 1234 /M "Your choice: "
if errorlevel 4 goto abort
if errorlevel 3 goto ip
if errorlevel 2 goto join
if errorlevel 1 goto host

:ip
cls
echo EDuke32-oldmp
echo Launcher
echo [GET IP]
echo.
echo 1. LAN Game IPv4 Address
echo 2. INTERNET IP Address
echo 3. Back
echo.
choice /C 123 /M "Your choice: "
if errorlevel 3 goto start
if errorlevel 2 goto netip
if errorlevel 1 goto lanip

:netip
cls
echo EDuke32-oldmp
echo Launcher
echo [GET INTERNET IP]
echo.
echo Your External IP Address is:
nslookup myip.opendns.com resolver1.opendns.com | find "Address" | find /V "222"
echo.
echo The other player(s) must enter your IP Address
echo Returning to start...
pause
goto start

:lanip
cls
echo EDuke32-oldmp
echo Launcher
echo [GET LAN IP]
echo.
echo Your Local IP Address is:
ipconfig | find "IPv4"
echo.
echo The other player(s) must enter your IP Address
echo Returning to start...
pause
goto start

:host
cls
echo EDuke32-oldmp
echo Multiplayer Launcher
echo [HOSTING]
dir/w /b *.grp
echo.
echo Enter the grp file name to run
set /p GRP=without the ".grp":
IF "%GRP%" == "" goto noname
if not exist %GRP%.grp goto nogrp
echo.
echo grp selected is: %GRP%.grp
set /p NAME=Name:
echo.
echo How many other players, you plus up to 2 more, in this game? (1-2)
echo.
choice /C 12 /M "Number of other players: "
if errorlevel 2 goto hostthree
if errorlevel 1 goto hosttwo

:join
cls
echo EDuke32-oldmp
echo Multiplayer Launcher
echo [JOINING]
dir/w /b *.grp
echo.
echo Enter the grp file name to run
set /p GRP=without the ".grp":
IF "%GRP%" == "" goto noname
if not exist %GRP%.grp goto nogrp
echo grp selected is: %GRP%.grp
set /p NAME=Name:
echo.
echo How many other players, you plus up to 2 more, in this game? (1-2)
echo.
choice /C 12 /M "Number of other players: "
if errorlevel 2 goto jointhree
if errorlevel 1 goto jointwo

:hosttwo
cls
echo.
echo You are hosting
echo You are Player 1 of 2
echo.
echo Enter Player 2's IP Address
set /p p2=:
echo pausing till ready
pause
set last=eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net /n1 %p2%
echo %last%>_last.bat
echo pausing till ready
eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net /n1 %p2%
goto end

:hostthree
cls
echo.
echo You are hosting %GRP%.grp
echo You are Player 1 of 3
echo.
echo Enter Player 2's IP Address
set /p p2=:
echo Enter Player 3's IP Address
set /p p3=:
echo pausing till ready
pause
set last=eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net /n1 %p2% %p3%
echo %last%>_last.bat
eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net /n1 %p2% %p3%
goto end

:jointwo
cls
echo EDuke32-oldmp
echo Multiplayer Launcher
echo [JOINING]
echo.
echo You are joining %GRP%.grp
echo You are Player 2 of 2
echo.
echo Enter Player 1's IP Address
set /p p1=:
echo pausing till ready
pause
set last=eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net %p1% /n1
echo %last%>_last.bat
eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net %p1% /n1
goto end

:jointhree
cls
echo EDuke32-oldmp
echo Multiplayer Launcher
echo [JOINING]
echo.
echo Are you player 2 or 3?
echo.
choice /C 23 /M "Player Number: "
if errorlevel 2 goto jointhreep3
if errorlevel 1 goto jointhreep2

:jointhreep2
cls
echo EDuke32-oldmp
echo Multiplayer Launcher
echo [JOINING]
echo.
echo You are joining %GRP%.grp
echo You are Player 2 of 3
echo.
echo Enter Player 1's IP Address
set /p p1=:
echo Enter Player 3's IP Address
set /p p3=:
echo pausing till ready
pause
set last=eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net %p1% /n1 %p3%
echo %last%>_last.bat
eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net %p1% /n1 %p3%
goto end

:jointhreep3
cls
echo EDuke32-oldmp
echo Multiplayer Launcher
echo [JOINING]
echo.
echo You are joining %GRP%.grp
echo You are Player 3 of 3
echo.
echo Enter Player 1's IP Address
set /p p1=:
echo Enter Player 2's IP Address
set /p p2=:
echo pausing till ready
pause
set last=eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net %p1% %p2% /n1
echo %last%>_last.bat
eduke32-oldmp.exe -g %GRP%.grp -name %NAME% /net %p1% %p2% /n1
goto end

:nogrp
echo.
echo %GRP%.grp does not exist!
echo.
pause
goto abort

:noname
echo.
echo You did not enter a GRP_NAME!
echo.
pause
goto abort

:end
cls
echo settings saved to "_last.bat"
pause
goto start

:abort

[Kyanos]

I thought about the best way to start larger games and came up with another .bat file to help.
The first post has a launcher that each player runs to start the game, each player needs to enter the IP's.
That's fine for 2-3 players, at most each person inputs 2 IP's, a total of 6 IP's typed by hand spread out over 3 players.
For larger games this could mean 8 players have to type 7 IP's totaling 56 IP's typed by hand, probably a few errors, too much work either way.
So I restructured the launcher into a 2-8 player command line .bat creator.

This launch setup.bat lets one person type in each players name and IP. It uses the list of names and IP's to make all the .bat files for each player to run on their own machines.
 EDuke32-oldmp_launch_setup.zip (1.33K)
Number of downloads: 248

Again, code is in plain text in spoiler.

Spoiler

echo off

:start
cls
echo EDuke32-oldmp
echo Launch Setup
echo.
echo 1. Setup 2-8 Players
echo 2. Get IP Address
echo 3. Quit
echo.
choice /C 123 /M "Your choice: "
if errorlevel 3 goto abort
if errorlevel 2 goto ip
if errorlevel 1 goto setup

:ip
cls
echo EDuke32-oldmp
echo Launch Setup
echo [GET IP]
echo.
echo 1. LAN Game IPv4 Address
echo 2. INTERNET IP Address
echo 3. Back
echo.
choice /C 123 /M "Your choice: "
if errorlevel 3 goto start
if errorlevel 2 goto netip
if errorlevel 1 goto lanip

:netip
cls
echo EDuke32-oldmp
echo Launch Setup
echo [GET INTERNET IP]
echo.
echo Your External IP Address is:
nslookup myip.opendns.com resolver1.opendns.com | find "Address" | find /V "222"
echo.
echo Returning to start...
pause
goto start

:lanip
cls
echo EDuke32-oldmp
echo Launch Setup
echo [GET LAN IP]
echo.
echo Your Local IP Address is:
ipconfig | find "IPv4"
echo.
echo Returning to start...
pause
goto start

:setup
cls
echo EDuke32-oldmp
echo Multiplayer Launch Setup
echo.
dir/w /b *.grp
echo.
echo Enter the grp file name to run
set /p GRP=without the ".GRP":
IF "%GRP%" == "" goto noname
echo.
echo grp selected is: %GRP%.GRP
echo.
echo How many players? (2-8)
echo.
choice /C 2345678 /M "Number of players: "
if errorlevel 7 goto eight
if errorlevel 6 goto seven
if errorlevel 5 goto six
if errorlevel 4 goto five
if errorlevel 3 goto four
if errorlevel 2 goto three
if errorlevel 1 goto two

:two
cls
echo EDuke32-oldmp
echo Multiplayer Launch Setup
echo [SETUP 2 PLAYERS]
echo.
set /p p1n=Enter Player 1's Name:
echo Enter Player 1's IP Address
set /p p1a=:
set /p p2n=Enter Player 2's Name:
echo Enter Player 2's IP Address
set /p p2a=:
echo.
set p1bat=eduke32-oldmp.exe -g %GRP%.grp -name %p1n% /net /n1 %p2a%
echo %p1bat%>_player1.bat
echo Created _player1.bat
pause
set p2bat=eduke32-oldmp.exe -g %GRP%.grp -name %p2n% /net %p1a% /n1
echo %p2bat%>_player2.bat
echo Created _player2.bat
pause
goto end


:three
cls
echo EDuke32-oldmp
echo Multiplayer Launch Setup
echo [SETUP 3 PLAYERS]
echo.
set /p p1n=Enter Player 1's Name:
echo Enter Player 1's IP Address
set /p p1a=:
set /p p2n=Enter Player 2's Name:
echo Enter Player 2's IP Address
set /p p2a=:
set /p p3n=Enter Player 3's Name:
echo Enter Player 3's IP Address
set /p p3a=:
echo.
set p1bat=eduke32-oldmp.exe -g %GRP%.grp -name %p1n% /net /n1 %p2a% %p3a%
echo %p1bat%>_player1.bat
echo Created _player1.bat
pause
set p2bat=eduke32-oldmp.exe -g %GRP%.grp -name %p2n% /net %p1a% /n1 %p3a%
echo %p2bat%>_player2.bat
echo Created _player2.bat
pause
set p3bat=eduke32-oldmp.exe -g %GRP%.grp -name %p3n% /net %p1a% %p2a% /n1
echo %p3bat%>_player3.bat
echo Created _player3.bat
pause
goto end

:four
cls
echo EDuke32-oldmp
echo Multiplayer Launch Setup
echo [SETUP 4 PLAYERS]
echo.
set /p p1n=Enter Player 1's Name:
echo Enter Player 1's IP Address
set /p p1a=:
set /p p2n=Enter Player 2's Name:
echo Enter Player 2's IP Address
set /p p2a=:
set /p p3n=Enter Player 3's Name:
echo Enter Player 3's IP Address
set /p p3a=:
set /p p4n=Enter Player 4's Name:
echo Enter Player 4's IP Address
set /p p4a=:
echo.
set p1bat=eduke32-oldmp.exe -g %GRP%.grp -name %p1n% /net /n1 %p2a% %p3a% %p4a%
echo %p1bat%>_player1.bat
echo Created _player1.bat
pause
set p2bat=eduke32-oldmp.exe -g %GRP%.grp -name %p2n% /net %p1a% /n1 %p3a% %p4a%
echo %p2bat%>_player2.bat
echo Created _player2.bat
pause
set p3bat=eduke32-oldmp.exe -g %GRP%.grp -name %p3n% /net %p1a% %p2a% /n1 %p4a%
echo %p3bat%>_player3.bat
echo Created _player3.bat
pause
set p4bat=eduke32-oldmp.exe -g %GRP%.grp -name %p4n% /net %p1a% %p2a% %p3a% /n1
echo %p4bat%>_player4.bat
echo Created _player4.bat
pause
goto end

:five
cls
echo EDuke32-oldmp
echo Multiplayer Launch Setup
echo [SETUP 5 PLAYERS]
echo.
set /p p1n=Enter Player 1's Name:
echo Enter Player 1's IP Address
set /p p1a=:
set /p p2n=Enter Player 2's Name:
echo Enter Player 2's IP Address
set /p p2a=:
set /p p3n=Enter Player 3's Name:
echo Enter Player 3's IP Address
set /p p3a=:
set /p p4n=Enter Player 4's Name:
echo Enter Player 4's IP Address
set /p p4a=:
set /p p5n=Enter Player 5's Name:
echo Enter Player 5's IP Address
set /p p5a=:
echo.
set p1bat=eduke32-oldmp.exe -g %GRP%.grp -name %p1n% /net /n1 %p2a% %p3a% %p4a% %p5a%
echo %p1bat%>_player1.bat
echo Created _player1.bat
pause
set p2bat=eduke32-oldmp.exe -g %GRP%.grp -name %p2n% /net %p1a% /n1 %p3a% %p4a% %p5a%
echo %p2bat%>_player2.bat
echo Created _player2.bat
pause
set p3bat=eduke32-oldmp.exe -g %GRP%.grp -name %p3n% /net %p1a% %p2a% /n1 %p4a% %p5a%
echo %p3bat%>_player3.bat
echo Created _player3.bat
pause
set p4bat=eduke32-oldmp.exe -g %GRP%.grp -name %p4n% /net %p1a% %p2a% %p3a% /n1 %p5a%
echo %p4bat%>_player4.bat
echo Created _player4.bat
pause
set p5bat=eduke32-oldmp.exe -g %GRP%.grp -name %p5n% /net %p1a% %p2a% %p3a% %p4a% /n1
echo %p5bat%>_player5.bat
echo Created _player5.bat
pause
goto end

:six
cls
echo EDuke32-oldmp
echo Multiplayer Launch Setup
echo [SETUP 6 PLAYERS]
echo.
set /p p1n=Enter Player 1's Name:
echo Enter Player 1's IP Address
set /p p1a=:
set /p p2n=Enter Player 2's Name:
echo Enter Player 2's IP Address
set /p p2a=:
set /p p3n=Enter Player 3's Name:
echo Enter Player 3's IP Address
set /p p3a=:
set /p p4n=Enter Player 4's Name:
echo Enter Player 4's IP Address
set /p p4a=:
set /p p5n=Enter Player 5's Name:
echo Enter Player 5's IP Address
set /p p5a=:
set /p p6n=Enter Player 6's Name:
echo Enter Player 6's IP Address
set /p p6a=:
echo.
set p1bat=eduke32-oldmp.exe -g %GRP%.grp -name %p1n% /net /n1 %p2a% %p3a% %p4a% %p5a% %p6a%
echo %p1bat%>_player1.bat
echo Created _player1.bat
pause
set p2bat=eduke32-oldmp.exe -g %GRP%.grp -name %p2n% /net %p1a% /n1 %p3a% %p4a% %p5a% %p6a%
echo %p2bat%>_player2.bat
echo Created _player2.bat
pause
set p3bat=eduke32-oldmp.exe -g %GRP%.grp -name %p3n% /net %p1a% %p2a% /n1 %p4a% %p5a% %p6a%
echo %p3bat%>_player3.bat
echo Created _player3.bat
pause
set p4bat=eduke32-oldmp.exe -g %GRP%.grp -name %p4n% /net %p1a% %p2a% %p3a% /n1 %p5a% %p6a%
echo %p4bat%>_player4.bat
echo Created _player4.bat
pause
set p5bat=eduke32-oldmp.exe -g %GRP%.grp -name %p5n% /net %p1a% %p2a% %p3a% %p4a% /n1 %p6a%
echo %p5bat%>_player5.bat
echo Created _player5.bat
pause
set p6bat=eduke32-oldmp.exe -g %GRP%.grp -name %p6n% /net %p1a% %p2a% %p3a% %p4a% %p5a% /n1
echo %p6bat%>_player6.bat
echo Created _player6.bat
pause
goto end

:seven
cls
echo EDuke32-oldmp
echo Multiplayer Launch Setup
echo [SETUP 7 PLAYERS]
echo.
set /p p1n=Enter Player 1's Name:
echo Enter Player 1's IP Address
set /p p1a=:
set /p p2n=Enter Player 2's Name:
echo Enter Player 2's IP Address
set /p p2a=:
set /p p3n=Enter Player 3's Name:
echo Enter Player 3's IP Address
set /p p3a=:
set /p p4n=Enter Player 4's Name:
echo Enter Player 4's IP Address
set /p p4a=:
set /p p5n=Enter Player 5's Name:
echo Enter Player 5's IP Address
set /p p5a=:
set /p p6n=Enter Player 6's Name:
echo Enter Player 6's IP Address
set /p p6a=:
set /p p7n=Enter Player 7's Name:
echo Enter Player 7's IP Address
set /p p7a=:
echo.
set p1bat=eduke32-oldmp.exe -g %GRP%.grp -name %p1n% /net /n1 %p2a% %p3a% %p4a% %p5a% %p6a% %p7a%
echo %p1bat%>_player1.bat
echo Created _player1.bat
pause
set p2bat=eduke32-oldmp.exe -g %GRP%.grp -name %p2n% /net %p1a% /n1 %p3a% %p4a% %p5a% %p6a% %p7a%
echo %p2bat%>_player2.bat
echo Created _player2.bat
pause
set p3bat=eduke32-oldmp.exe -g %GRP%.grp -name %p3n% /net %p1a% %p2a% /n1 %p4a% %p5a% %p6a% %p7a%
echo %p3bat%>_player3.bat
echo Created _player3.bat
pause
set p4bat=eduke32-oldmp.exe -g %GRP%.grp -name %p4n% /net %p1a% %p2a% %p3a% /n1 %p5a% %p6a% %p7a%
echo %p4bat%>_player4.bat
echo Created _player4.bat
pause
set p5bat=eduke32-oldmp.exe -g %GRP%.grp -name %p5n% /net %p1a% %p2a% %p3a% %p4a% /n1 %p6a% %p7a%
echo %p5bat%>_player5.bat
echo Created _player5.bat
pause
set p6bat=eduke32-oldmp.exe -g %GRP%.grp -name %p6n% /net %p1a% %p2a% %p3a% %p4a% %p5a% /n1 %p7a%
echo %p6bat%>_player6.bat
echo Created _player6.bat
pause
set p7bat=eduke32-oldmp.exe -g %GRP%.grp -name %p7n% /net %p1a% %p2a% %p3a% %p4a% %p5a% %p6a% /n1
echo %p7bat%>_player7.bat
echo Created _player7.bat
pause
goto end

:eight
cls
echo EDuke32-oldmp
echo Multiplayer Launch Setup
echo [SETUP 8 PLAYERS]
echo.
set /p p1n=Enter Player 1's Name:
echo Enter Player 1's IP Address
set /p p1a=:
set /p p2n=Enter Player 2's Name:
echo Enter Player 2's IP Address
set /p p2a=:
set /p p3n=Enter Player 3's Name:
echo Enter Player 3's IP Address
set /p p3a=:
set /p p4n=Enter Player 4's Name:
echo Enter Player 4's IP Address
set /p p4a=:
set /p p5n=Enter Player 5's Name:
echo Enter Player 5's IP Address
set /p p5a=:
set /p p6n=Enter Player 6's Name:
echo Enter Player 6's IP Address
set /p p6a=:
set /p p7n=Enter Player 7's Name:
echo Enter Player 7's IP Address
set /p p7a=:
set /p p8n=Enter Player 8's Name:
echo Enter Player 8's IP Address
set /p p8a=:
echo.
set p1bat=eduke32-oldmp.exe -g %GRP%.grp -name %p1n% /net /n1 %p2a% %p3a% %p4a% %p5a% %p6a% %p7a% %p8a%
echo %p1bat%>_player1.bat
echo Created _player1.bat
pause
set p2bat=eduke32-oldmp.exe -g %GRP%.grp -name %p2n% /net %p1a% /n1 %p3a% %p4a% %p5a% %p6a% %p7a% %p8a%
echo %p2bat%>_player2.bat
echo Created _player2.bat
pause
set p3bat=eduke32-oldmp.exe -g %GRP%.grp -name %p3n% /net %p1a% %p2a% /n1 %p4a% %p5a% %p6a% %p7a% %p8a%
echo %p3bat%>_player3.bat
echo Created _player3.bat
pause
set p4bat=eduke32-oldmp.exe -g %GRP%.grp -name %p4n% /net %p1a% %p2a% %p3a% /n1 %p5a% %p6a% %p7a% %p8a%
echo %p4bat%>_player4.bat
echo Created _player4.bat
pause
set p5bat=eduke32-oldmp.exe -g %GRP%.grp -name %p5n% /net %p1a% %p2a% %p3a% %p4a% /n1 %p6a% %p7a% %p8a%
echo %p5bat%>_player5.bat
echo Created _player5.bat
pause
set p6bat=eduke32-oldmp.exe -g %GRP%.grp -name %p6n% /net %p1a% %p2a% %p3a% %p4a% %p5a% /n1 %p7a% %p8a%
echo %p6bat%>_player6.bat
echo Created _player6.bat
pause
set p7bat=eduke32-oldmp.exe -g %GRP%.grp -name %p7n% /net %p1a% %p2a% %p3a% %p4a% %p5a% %p6a% /n1 %p8a%
echo %p7bat%>_player7.bat
echo Created _player7.bat
pause
set p8bat=eduke32-oldmp.exe -g %GRP%.grp -name %p8n% /net %p1a% %p2a% %p3a% %p4a% %p5a% %p6a% %p7a% /n1
echo %p8bat%>_player8.bat
echo Created _player8.bat
pause
goto end

:noname
echo.
echo You did not enter a GRP_NAME!
echo.
pause
goto start

:end
cls

:abort