Creates a sense of competition

1. Achievement vs Completion (Gamification And Bloom's Taxonomy Tips)
2. Player Data vs Game Data (Gamification Achievement Systems Tips)
3. Player Expectations vs Player Satisfaction (Gamification Player Progression Tips)
4. Pricing Strategy vs Monetization Strategy (Virtual Economy Gamification Tips)
5. Skill Progression vs Ability Progression (Gamification Player Progression Tips)