[업적 시스템](/pages/Achievement%20system.txt) 설계에 대한 GDC2010 강연.

The Nightmare Self-Fulfilling Scenario:

1. make an intrinsically interesting game, congratulations!
2. use extrinsic motivators to make your game better
3. destroy <intrinsic motivation> to play your game
4. metrics fetishism pushes you towards designs where EM works

Minimizing the Damage:

- Don't make a big fuss about them
- Use unexpected rewards
- Use absolute, not relative measures
- Use endogenous rewards
- Make them informational, not controlling.

Call to Action:

- The industry needs to start studying the long term impact of achievements on players
- Developers need to be better versed in the literature and more thoughtful about the consequences of extrinsic motivators