By that reasoning, The Sims, the new Prince of Persia, and Farmville also wouldn't be games. If they aren't games, what are they?Sir John the Net Knight said:Except that Minecraft is not a game. Just like The Path is not a game, nor is The Graveyard.
A game is leisure activity involving one or more participants where a set of challenges are completed to achieve a definable goal.
None of those programs fit this description. Path and Graveyard are devoid of any challenges, while Minecraft lacks any sort of definable goal.
Nowadays very few developers use the definition you posted above. They recognize that goals can be implied (as in the case of Mincraft), and that difficulty can be mitigated for players who enjoy creativity and storytelling more than overcoming some arbitrary challenge. These type of games might not be for everyone, but neither are challenge-based games.