Contact

This window shows the current contacts that you have.

Clicking on each contact gives two options:

1. Add to short list - Display this particular contact on the top of the contact list.
2. Send as contact to another player - you can link up players to become each other's contacts. You must have both players as your own contacts first.

Establish contact using contact code

You can share the codes to get an in-game-contact with other existing players. If you have received an invitation code from another player, you can enter it here. You may contact other players by finding their workers on the map or by using an invite code.

Note: You may also establish contact though near workers belonging to another player.

Recruiting other players

Just make them start playing and make them enter your user name as the one who invited them. Every level they level up you get another score in the invite mission in the game.