Syntax: GTELL <message>
Syntax: SAY <message>
Syntax: TELL <character> <message>
All of these COMMANDS send messages to other players. GTELL sends a message to
all of the characters in your group, wherever they are, even if they are
sleeping or stunned or dying. ';' is a synonym for GTELL.
SAY sends a message to all awake players in your room. The single quote '''
is a synonym for SAY.
TELL sends a message to one awake player anywhere in the world.
REPLY sends a message to the last player WHO sent you a TELL. REPLY will work
even if you can't see the player, and without revealing their identity. This
is handy for talking to invisible or switched immortal players.