At a minimum you must implement player-select-move. The others are optional and will default to doing nothing.

(defmethod player-start-game ((player YOUR-PLAYER) rules role timeout)
+(defmethod ggp:player-start-game ((player YOUR-PLAYER) rules role timeout)
   ...)
 
 
@@ -71,7 +71,7 @@
 timeout is the timestamp that the response to the server is due by, in
 internal-real time units (more on this later).
 player-update-game
-(defmethod player-update-game ((player YOUR-PLAYER) moves)
+(defmethod ggp:player-update-game ((player YOUR-PLAYER) moves)
   ...)
 
 
@@ -81,7 +81,7 @@
 moves will be an association list of (role . move) conses representing the
 moves made by each player last turn.
 player-select-move
-(defmethod player-select-move ((player YOUR-PLAYER) timeout)
+(defmethod ggp:player-select-move ((player YOUR-PLAYER) timeout)
   ...)
 
 
@@ -91,7 +91,7 @@
 timeout is the timestamp that the response to the server is due by, in
 internal-real time units (more on this later).
 player-stop-game
-(defmethod player-stop-game ((player YOUR-PLAYER))
+(defmethod ggp:player-stop-game ((player YOUR-PLAYER))
   ...)