Upon returning from the trip, Thomas Jefferson received a Letter from you and your Corps that inventories all the plants, animals, and other things that you discovered during the journey.  Take a look at this letter before you move on to the game part of this quest.  (The typed letter might be a bit easier to read!)

Although your field journal may be tattered and torn from its voyage over the mountains and through the snow, everything you have recorded is safe and sound and ready to share with the world.  Now you must do just that: tell the world what you have found!  By creating the GAME, you can let everyone else in America know just how many amazing new things you have seen.  So read through your journal to refresh your memory (it has been almost 3 years, after all), and get started!  You should be excited to tell everyone you know about your adventure into the unknown!