You quoted Imamadmad's statement: "the story is identical, regardless of which characters are in your team or how many times you fail a level."
This statement confirms that the game should remain invalid. By our policies, any story that can vary from viewer/player to viewer/player is not considered valid.
I'll quote an example from User:CzechOut at Thread:161867, the thread on which this game was previously declared invalid:
- "The fact you can have so many different combinations of team-members means that it is of course not a reliable source. To whom did Nightmare in Silver happen? The answer of this wiki is 'The Eleventh Doctor, Clara Oswald, her two charges, Porridge, and some near-reject soldiers'.
- The answer is not 'The Second Doctor, Jack Harkness, River Song, Strax, and an Adipose'."
The full statement of the policy can be read near the bottom of the forum thread Forum:Why do prefixes link as they do? (specifically the penultimate paragraph) and of course at Tardis:Valid sources#When the licensor is the BBC.