To start a co-op game, click on Server Host while on the multiplayer tab.

Doing this will start up a lobby which players can connect to, for hosts there are two important options you can set before creating a lobby, Password and Port, the IP does not matter for server hosts though.

If you'd like to prevent people you don't know from joining, you can require a password to connect to the lobby. If a client enters the wrong password, they won't be able to connect to the server.

If someone on your IP range is already hosting a server, for Cash_Out or another program, you can change the port. You'll get an error if you try to host a server on a port that is already in used. The default port is 6510.

When creating a server, if the port is free, you'll connect to the lobby with this message.


This will let you know if clients can connect to your game, if the server can be found and connected to, you're all set. That being said, if this is your first time hosting a server, you'll probably get an error saying the port is not forwarded properly.

There are two major issues that would prevent a client from being able to connect to a server, firewalls and port forwarding.

Firewalls prevent incoming connections to your IP, when first creating a server, if using Windows the option to add the server to the allowed connection list will pop up. If this message doesn't pop up, you may have already disabled connections to Cash_Out (or enabled them), either turn off your firewall (not reccomended) or go into the advanced settings for the firewall, in Inbound Rules, find Cash_Out, and enable the connection.

There's a much larger chance that the port forwarding is not correct. Unfortunately, Port Forwarding is fairly complex, as it differs between router manufacturers. If you know what manufacturer created your router, you can search how to port forward with that router.

A helpful resource for this is SetupRouter[setuprouter.com]. Remember to use the port you wish to use when hosting a server, and to use your internal IP.

To find your internal ip, SetupRouter[setuprouter.com] has a helpful guide aswell.

Your external IP is used for clients to connect to your server, and when these steps are completed, they should be able to.

Even if a client can connect, there are some more errors that can come across.

If the client takes too long to connect, or the client's ping is too high, they'll get disconnected with this message. Host the server on a better connection to avoid this.

The password the client entered was not the password that the server entered.

A maximum of four people can connect to the lobby at once, if more than four people try to connect, you will get this error message.

You are using an outdated version of Cash_Out compared to the server. Either that, or the server is using an outdated version and you are not. To connect, ensure that both the clients and the server are updated!

It is only possible to connect to Cash_Out from the lobby, if the countdown to start the game is started, this will stop other clients from being able to connect!

If there's anything I missed, feel free to comment in this guide, there's a very high chance if this didn't work, it is something unrelated to Cash_Out.

Try out CanYouSeeMe[www.canyouseeme.org] to totally ensure that everything is setup, if the tool can see your port, everything is setup right.

Enjoy!