The third choice is not visible to the player as it requires no player interaction.

It's a clever way of introducing player interaction that doesn't involve combat.

The intent was to further increase the amount of "player interaction and improvisation" over their previous games.

Where the game could really become interesting is with player interaction.

Gameplay involves player interaction with the game, usually for the purpose of entertainment, education or training.

Focus node is a location of a shared resource, increasing player interaction.

A game of solitaire, for obvious reasons, has no player interaction.

The game must not pay out a prize without a reasonable amount of player interaction.

They generally have simple rules, short to medium playing times, indirect player interaction and abstract physical components.

A look at player interactions, gender and story creation in the game.