The achievement is for sending a message from each category (of radial command) in a single match. The key word being "category". Once you bring up the radial command options with
pick 1 command from "default", "strategic", & "social" respectively. Only 3 commands are needed to unlock this achievement but they must be from each of the 3 different "categories". When you 1st open the radial command menu you will be in "default" choose a command with the
, to switch to "strategic" press
then choose a command, to switch to "social" press
& choose the command to unlock the achievement. Hope this helps.