Custom Game
To create a new Custom Game, start on the OOTP Start Screen and click on NEW GAME
Next click on New Custom Game
Next Click on Fictional Button
On Step 1 you can choose different options to create your fictional league. On the left hand side you can use the drop down menu you choose from pre-defined options or use the Modify League Structure section to set how many sub leagues you want 1 or 2, then how many divisions you want, 1-50, and then how many teams you want per division 2-50.