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Music

Game Optimization through Large-Scale Experimentation Erik Andersen Ph.D. student Center for Game Science University of Washington Computer Science Dept. Music. Art. Sound effects. Gameplay. ?. engagement retention revenue. A/B Testing. A/B Testing. A. B. Metrics. Levels completed

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Music

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  1. Game Optimization through Large-Scale ExperimentationErik AndersenPh.D. studentCenter for Game ScienceUniversity of Washington Computer Science Dept.

  2. Music Art Sound effects Gameplay

  3. ? engagement retention revenue

  4. A/B Testing

  5. A/B Testing A B

  6. Metrics • Levels completed • Time played • Return rate

  7. Aesthetics Secondary Objectives Tutorials

  8. Foldit Refraction Hello Worlds

  9. Refraction

  10. Rating: 3.8 / 5 400,000 plays

  11. Hello Worlds!

  12. Rating: 4.2 / 5 1,385,000 plays

  13. Foldit

  14. 240,000 players

  15. Player Tracking • Flash cache / login name • New players only

  16. Statistical significance 95% confidence level (p<0.05)

  17. Music Experiment #1: Audio Sound Effects

  18. Result: Music and sound effects did not matter

  19. Experiment #2: Animations

  20. Result: Animations improved engagement

  21. Refraction No Animations

  22. Refraction No Animations

  23. Refraction No Animations

  24. Hello Worlds No Animations

  25. Hello Worlds No Animations

  26. Experiment #3: Secondary Objectives (Super Mario Bros., Nintendo 1985)

  27. 100 % of players 0 Levels

  28. Hypothesis 100 With Coins % of players 0 Levels

  29. Reality 100 With Coins % of players 0 Levels

  30. What about time played? 100 % of players 0 Time

  31. Hypothesis 100 With Coins % of players 0 Time

  32. Hypothesis 100 With Coins % of players 0 Time

  33. Reality: Many Players Quit Sooner 100 With Coins % of players 0 Time

  34. 100 % of players 0 Time

  35. Result: secondary objectives harmed engagement

  36. (Assassin’s Creed, Ubisoft 2007)

  37. Maybe easier is better? (Super Mario Bros., Nintendo 1985)

  38. 100 Off-path Coins % of players 0 Time

  39. 100 On-path Coins % of players 0 Time

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