Summary
Design lenses are Jesse Schell’s core methodology from The Art of Game Design. Each lens is a small set of questions to ask about your game design, representing a particular perspective or angle of inquiry. There are 100 lenses in the book, introduced one at a time as relevant concepts are covered.
Lenses are not blueprints, recipes, or rules. They are tools for examination. No lens is perfect or complete, but each is useful in the right context. The power of the system comes from applying many lenses in combination — where one lens misses something, another will catch it.
“Good game design happens when you view your game from as many perspectives as possible.” (Schell, The Art of Game Design, see source-art-of-game-design)
Key ideas
- Lenses are questions, not answers. They prompt the designer to think, not prescribe what to do.
- The metaphor is deliberate: each lens refracts the same game differently, revealing different features.
- They are empirically derived from Schell’s professional experience across circus performance, theme park design, Disney VR, and academic game design teaching.
- A companion card deck (one card per lens) is available at artofgamedesign.com for use during active design sessions.
Selected lenses
A sample of the most broadly applicable lenses:
| # | Lens | Core question |
|---|---|---|
| 1 | Essential Experience | What experience do I want players to have? |
| 6 | Problem Solving | What problems must the player solve? |
| 7 | Elemental Tetrad | Are all four elements present and in harmony? |
| 8 | Holographic Design | Can I see skin and skeleton simultaneously? |
| 15 | The Toy | Is the game fun to play with even before there are goals? |
| 16 | The Player | What are my players’ needs and desires? |
| 17 | Pleasure | What pleasures does my game provide? |
| 18 | Flow | Is the game in the right balance of challenge and skill? |
| 25 | Goals | Are goals clear, achievable, and motivating? |
| 26 | Rules | Are the rules complete, consistent, and understood by players? |
| 31 | Challenge | Is the challenge at the right level throughout? |
| 32 | Meaningful Choices | Are the choices players make meaningful and interesting? |
| 43 | Elegance | Is each element of the game doing many jobs at once? |
| 57 | Feedback | Does the game clearly communicate what is happening? |
| 58 | Juiciness | Is every action rewarded with feedback? |
| 61 | Interest Curve | Does the pacing hold interest from start to finish? |
| 91 | Playtesting | Are we getting the right playtest data, from the right people, asking the right questions? |
In practice
Use lenses during design reviews, ideation sessions, and playtesting analysis:
- During ideation: Pick 5–10 lenses and use them to stress-test a concept before building anything.
- During development: Apply the Elemental Tetrad lens regularly to check all four areas are receiving attention.
- After playtesting: Use the Interest Curve lens and Feedback lens to interpret what you observed.
- Before shipping: Run through the Juiciness, Flow, and Meaningful Choices lenses as a final check.
In Unity/C# projects, the lenses most directly applicable to technical decisions are #7 (Tetrad — technology element), #18 (Flow — difficulty tuning), #57 (Feedback — audio/VFX/UI response), and #58 (Juiciness — polish and responsiveness).
Evidence
Schell frames the entire book around the problem that there is no “unified theory of game design” — no Mendeleev’s periodic table for games. The lenses are the pragmatic response:
“We are in a position something like the ancient alchemists. In the time before Mendeleev discovered the periodic table… alchemists relied on a patchwork quilt of rules of thumb… These were necessarily incomplete, sometimes incorrect… but by using these rules, the alchemists were able to accomplish surprising things.” (Schell, The Art of Game Design, see source-art-of-game-design)
Open questions
- With 100 lenses, which are the most universally applicable at student project scale?
- Are there concepts from game design research since 2008 that would constitute new lenses?
Related
- elemental-tetrad — Lens #7
- flow — Lens #18
- interest-curves — Lens #61
- game-feel — Related to Lens #58 (Juiciness)
- holographic-design — Lens #8
- playtesting — Lens #91
- lenses-reference — Full list of all 100 lenses
- source-art-of-game-design