This guide is to allow people to play SSN21-Seawolf in multiplayer mode (i.e. against another player through the web). The multiplayer mode in the game is essentially designed as cooperative (i.e. you will play the exact same mission as you do in single player with the same number of neutral and enemy ships with the addition of a second player in another Seawolf Class sub) but nothing stops you to play head to head whatever the mission you choose.
One of the players must act as a server and the other player must act as a client.
To play any game in multiplayer mode with DOSbox or on one of its forks you must:
– Allow DOSbox or its fork through Windows firewall; this is enough if you are playing against someone under your local network (i.e. someone that is connected to the same router) or someone on the web and your machine is acting as a client and the other machine is acting as a server;
– Additionally you have to open/forward a port on your router if you are playing against someone on the web and your machine is acting as a server;
Following there are the instruction to create this connection through:
– Nullmodem cable connection;
Nullmodem cable connection
– The server must open the DOSBox configuration file and type next to serial1: nullmodem port:yyyyy (yyy..is the number of the port you want to use);
– Launch DOSBox and check on the console that the server has opened the connection and it is waiting for a client to be connected;
– The client must open the DOSBox configuration file and type next to serial1: nullmodem server:aaa.bbb.ccc.ddd port:yyyyy where aaa.bbb.ccc.ddd is the IP address of the server and yyyyy is the same port number the server is using;
– The client can launch DOSBox and both server and client must check in the console that the connection has been created;
– From the game folder both server and client launch the executable TWOPLAY;
– Both server and client press B at the same time;
– A chat window opens and both server and client can talk in the chat to make sure connection is established through the game;
– Both server and client press ESC at the same time;
– The game launches and both server and client can press SPACE to skip the introduction;
– The window to input the captain name opens up and both server and client, after typing their name press ENTER at the same time;
– At this point the server must wait for the client to choose the TWO PLAYER OPTION in the main menu and start the mission the client decides to play;
– Both server and client are launched into the mission;
