Glossary - Game Invaders: The Theory and Understanding of Computer Games - page 193

twitch factor: measure derived from a game' s activity profi le of how intense or measured
interaction with a game is, part of activity profi ling, introduced in Chapter 3.
virtual environment: alternative term for a virtual reality that does not emphasize
“ reality ” ; other worlds, artifi cial and imagined, are also possible.
virtual reality (VR): using graphics and sound to create the impression of a 3D world we
can interact with.
wanderers: people looking for a fun experience in a game. One of the four generic player
types as defi ned by International Hobo, introduced in Chapter 6.