I have the same question.
I tried going through the "multiplayer" shortcut in the start menu, setting one computer to host and the other to client, and puting in the ip of the host when starting the client. Then I tried both "serial" and "network", but neither seemed to work.

Better detailed instructions (like the ones for populous 1) would be really great.

Thanks

Please help me with 2-Player Setup under Windows 10. Thank you very much!

here is a possible solution: windows have 2 ip protocols: version 4 and version 6. version 4 is used for gaming. the thing is that some games tries to use version 6 even though they only support version 4. as a result you need to disable version 6 from network and sharing. there you can find your connection and change settings for network card. then you need to click your connection and select properties. there you will see internet protocol version 4 and internet protocol version 6, disable version 6 and click on ok.

I tried it this evening with a friend online, and we weren’t able to get anything to work. I looked online, but couldn’t find anything. [And I don’t know why this got marked as solved...]

Hi everyone here!

This topic was interesting for me so I've done some investigations.
Firstly background:
1) Every dosbox related game in GOG has each lunch configurations. For popilous they are:
a) dosboxPOPULOUS2.conf.
b) dosboxPOPULOUS2_client.conf.
c) dosboxPOPULOUS2_server.conf.
All three files should be found in game installation directory.
2) This configuration usage defind in your link as 'Target' property.
You can find example of how it works in dungeon keeper multiplayer tutorial, here on GoG (not able to add links, sorry).
So now to run multiplayer you need
1) Define correct traget props.
For server: change link target prop from dosboxPOPULOUS2.conf to dosboxPOPULOUS2_server.conf.
For client:
a) Open dosboxPOPULOUS2_client.conf in any text editor.
b) In [serial] section change serial2 value to the nullmodem server:%SERVER PLAYER IP%.
example: serial2=nullmodem server:101.102.103.104.
c) Replace [autoexec] with the next text:
mount C .
c:
Pop2 /ss /h
exit
d) Save dosboxPOPULOUS2_client.conf changes.
e) Change link target prop from dosboxPOPULOUS2.conf to dosboxPOPULOUS2_client.conf.
2) Firstly server should run his game.
3) After some delay(to be sure that connectivity possible), client should run his game to.
4) In two player menu one of you should defined hisself as good, and other as bad.
5) Select serial as connection type(connect serial), and model 2(should be defined as default so changes should not be necessery) and push connect button.
...
6) Profit! Multpiplayer runs for you!

About possible questions:
- While 2-nd player not connected errors should be received. This is OK.
- 2-nd Player will watch ???? in connection menu. This is OK.
If anyone will have futher questions: please do not hestitage to ask me.