However, it is also enlightening to compare pre-digital definitions to definitions made after digital games became more common. While earlier game definitions emphasized games as an activity, modern definitions highlight games as systems.
Length: Lots of long games work fine and wouldn't work if shortened: Diplomacy, Civilization, Empires in Arms. A big part of the game is the immersion achieved by the game length. It isn't something a game needs to be "saved" from.