For the station game:
The students need to finish the task at each station to get marks, so we need make sure the game in each station should not be overlapped. And before our station game, do we need to specify the certain language item we focus on in the game, or any input we need to give them?
My ideas about the station game: information hunt game which need the students to find certain information/clues  in certain area and then they need to combine all the information/clue to figure out the answer. The information/clue may be hided in certain area or hold by certain people(our faci), they need to search for it or they may need some questions to the faci to get the clue.
by the way, the station game has 2 hours, so for each station game, how many minutes should we prepare?