The tanks are coming. Are you ready?
/new_td_game easy|medium|hard will create a new tower defense game and tell you the ID needed to join it.
/end_td_game will end the tower defense game with the id.
/join_td_game will join the game of the given id.
/leave_td_game will exit your current game.
In order to create and end games you need the tower_defense priv.
Once in-game open your inventory to access the store where you can buy barricades, turrets, weapons, health for your flag, or even start the next wave.