To communicate with other players simply type! Press Enter to send your chat message. A chat bubble will appear under your character and a new line will appear in the Game log dialog. This kind of communication is public and visible to every player in world, although you will only see text for players near you.
Alternatively you can write:
/tell playername chat Content
This allows you to write to a single character privately. For example:
/tell miguel This game rules, really. I have rated it 10/10 :)
In order to ease the communication you can write to the lasted player you msged using //
// Really man!, go and rate it.
You can also write any of the administrators that are in game to request support by writting /support
/support I keep getting an out of memory exception, so the game crashes, can I avoid this?
You can discover who is online by using the command /who.
/who
This will show a list of the players that are online now with their levels.
You can find out a players position by querying server using /where player name
/where miguel
You can get help about the previous commands by using the command /help.
/help
This will return a list of the commands that are available to the player with a brief explanation of their usage and parameters.