Do you want to Co-op like Portal 2 in Portal 1? Here's how!
About port forwarding - [ Ссылка ]
Portal 1 Multiplayer Map - [ Ссылка ]
Portal 1 Multiplayer Mod - Sadly, Portal 1 multiplayer mod has currently unsupported.
If you have no idea how to configure router and port forwarding, you can use a virtual network program such as hamachi. (In this case, enter the host IP displayed in hamachi.)
![Resident Evil 2 : Ghost Survivors Demake [ Playstation Mod ]](http://i.ytimg.com/vi/j5oTr5h3Y2c/mqdefault.jpg)
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