Illusion of freedom
Some techniques which contribute to the illusion of freedom include:
- Influencing players to choose actions that the author wants them to choose.
- Time limited situations (or at least a sense of a time limit), where the player does not have time to probe too deeply into the limits of the implementation.
- Making the player too concerned with their immediate problems to be side tracked into other activities.
- Softening the edges of the world (see Emily Short's article on geography - search for "At the Edge of the World").
- Through richer implementation, including second level objects, a large number of conversation topics, multiple solutions to puzzles, and so on.