+Known ``source`` options:
+
+``gamer``
+ The user clicked onto "push to my ouya" on the OUYA website
+``game-of-the-month``
+ The game gets automatically installed because the OUYA people awarded it the
+ "game of the month" trophy.
+``new-user``
+ You are a freshly registered user and should have this game on your OUYA.
+