1. PLAYER
   1. Players Mind
      1. The Lens of Flow
      2. Motivation
         1. The Lens of Needs
         2. The Lens of Novelty
         3. The Lens of Judgment
         4. The Lens of Motivation
   2. The Lens of the Player
   3. The Lens of Pleasure
   4. The Lens of Transformation
   5. Other Players
      1. The Lens of Spectation
      2. Community
         1. The Lens of Friendship
         2. The Lens of Expression
         3. The Lens of Community
         4. The Lens of Griefing
2. GAME
   1. Interface
      1. The Lens of Control
      2. The Lens of Physical Interface
      3. The Lens of Virtual Interface
      4. The Lens of Transparency
      5. The Lens of Feedback
      6. The Lens of Juiciness
      7. The Lens of Primality
      8. The Lens of Channels and Dimensions
      9. The Lens of Modes
   2. The Lens of Surprise
   3. The Lens of Fun
   4. The Lens of Curiosity
   5. The Lens of Endogenous Value
   6. The Lens of Problem Solving
   7. Elements
      1. The Lens of the Elemental Tetrad
      2. The Lens of Holographic Design
   8. Theme
      1. The Lens of Unification
      2. The Lens of Resonance
   9. Technology
      1. The Lens of Technology
      2. The Lens of the Crystal Ball
      3. The Lens of Utopia
   10. The Lens of Playtesting
   11. Mechanics
       1. The Lens of Functional Space
       2. The Lens of Time
       3. The Lens of the State Machine
       4. The Lens of Secrets
       5. The Lens of Action
       6. The Lens of Goals
       7. The Lens of Rules
       8. The Lens of Skill
       9. The Lens of Expected Value
       10. The Lens of Chance
       11. The Lens of Emergence
       12. Balance
           1. The Lens of Fairness
           2. The Lens of Challenge
           3. The Lens of Meaningful Choices
           4. The Lens of Triangularity
           5. The Lens of Skill vs. Chance
           6. The Lens of Head and Hands
           7. The Lens of Competition
           8. The Lens of Cooperation
           9. The Lens of Competition vs. Cooperation
           10. The Lens of Reward
           11. The Lens of Punishment
           12. The Lens of Simplicity/Complexity
           13. The Lens of Elegance
           14. The Lens of Character
           15. The Lens of Imagination
           16. The Lens of Economy
           17. The Lens of Balance
       13. Puzzles
           1. The Lens of Accessibility
           2. The Lens of Visible Progress
           3. The Lens of Parallelism
           4. The Lens of the Pyramid
           5. The Lens of the Puzzle
3. EXPERIENCE
   1. Interest Curve
      1. The Lens of the Interest Curve
      2. The Lens of Inherent Interest
      3. The Lens of Beauty
      4. The Lens of Projection
      5. The Lens of Moments
   2. Indirect Control
      1. The Lens of Freedom
      2. The Lens of Help
      3. The Lens of Indirect Control
      4. The Lens of Collusion
   3. World
      1. The Lens of Fantasy
      2. The Lens of the World
      3. Characters
         1. The Lens of the Avatar
         2. The Lens of Character Function
         3. The Lens of Character Traits
         4. The Lens of the Interpersonal Circumplex
         5. The Lens of the Character Web
         6. The Lens of Status
         7. The Lens of Character Transformation
      4. Story
         1. The Lens of the Story Machine
         2. The Lens of the Obstacle
         3. The Lens of Simplicity and Transcendence
         4. The Lens of the Hero’s Journey
         5. The Lens of the Weirdest Thing
         6. The Lens of Story
      5. Asthetics
         1. The Lens of Atmosphere
      6. Spaces
         1. The Lens of Inner Contradiction
         2. The Lens of The Nameless Quality
   4. The Lens of Emotion
   5. The Lens of Essential Experience
   6. The Lens of Venue
4. PROCESS
   1. Idea
      1. The Lens of Infinite Inspiration
      2. The Lens of the Problem Statement
   2. Iteration
      1. he Lens of the Eight Filters
      2. The Lens of Risk Mitigation
      3. The Lens of the Toy
      4. The Lens of Passion
5. YOU
   1. Team
      1. The Lens of Love
      2. The Lens of the Team
   2. The Lens of Documentation
   3. The Lens of the Client
   4. The Lens of the Pitch
   5. The Lens of Profit
   6. The Lens of Responsibility
   7. Purpose
      1. The Lens of the Raven
      2. The Lens of Your Secret Purpose