/arathi - displays all available commands for the plugin
/arathi join - join the queue to play the Arathi Basin game
/arathi join <team> - join the queue to play the Arathi Basin game on a specific team
/arathi leave - leave the queue (or game if in progress)
/arathi tp - (OP) teleport to the Arathi Basin world
/arathi start - (OP) force start the Arathi Basin game
/arathi end - (OP) force end the Arathi Basin game

The structure command is used to setup a new world to work with the Arathi Basin game (tutorial for this can be found here)

/structure list - lists all structure in current world
/structure define <base/spawn> <name> - creates a new structure
/structure select <name> - selects a structure for editing
/structure module <module> - switches to the module of the selected structure
/structure deselect - deselects current structure
/structure remove - removes selected structure entirely
/structure color <color>" - sets the color of the selected structure
/structure direction - sets the direction of the selected structure to your position