Update readme.md

readme.md

@@ -12,3 +12,29 @@ There is a a blog post explaining the technical details [here](https://wheybags.
 [Youtube video of me and a friend playing Coop Campaign in 4k](http://www.youtube.com/watch?v=b-xWWKqjg54)
 
 [![](http://img.youtube.com/vi/b-xWWKqjg54/0.jpg)](http://www.youtube.com/watch?v=b-xWWKqjg54)
+
+
+# How to play
+Just run EmperorLauncher.exe, and the app will prompt you to insert or mount
+your Emperor CDs. It will not work with an existing install, the app will 
+create its own install folder from the CDs. Only works with the English
+version of Emperor.
+
+## How to play multiplayer:
+- One player must choose to host in the launcher
+- Other players must enter the host's IP in the launcher
+- You can use the button in the launcher to test connection, but only after
+  the host has launched the game
+- Click multiplayer in the main menu
+- Choose any username (must not be the same as other players), and type 8
+  random characters for a password
+- Click login
+- Click Custom
+- Hosting player click Host, others can click refresh if they don't see
+  the host's game
+- Host chooses Deathmatch or Co-op Campaign
+- All clients click Accept
+- Host clicks Play
+
+Don't click random buttons or change settings. I didn't make everything
+work, only the bare minimum.