| #2 |  Why People Play Why People Play
| 0 |
| #3 |  Gamify
| 3 |
| #4 |  The Gamification of Learning and Instruction: Game-Based Methods and Strategies for Training and Education
| 0 |
| #5 |  Game Frame
| 0 |
| #6 |  Eurogames : The Design, Culture and Play of Modern European Board Games
| 0 |
| #7 |  The Art of Game Design: A Book of Lenses
| 3.33 |
| #8 |  100 Principles of Game Design
| 0 |
| #9 |  Paid to Play Paid to Play
| 0 |
| #10 |  The Game Inventor's Guidebook
| 0 |
| #11 |  Homo ludens
| 2.5 |
| #12 |  Rules of Play
| 4 |
| #13 |  Kobold Guide to Board Game Design
| 3 |
